Mr. Gasket Rear Main Seal, Viton®, High Vacuum 1971

Name: Mr. Gasket Rear Main Seal, Viton®, High Vacuum 1971
Brand: Mr. Gasket
SKU: 4010923
Price: 73.99 CAD
Availability: InStock

$73.99 ea

NEWARRIVING SOONEstimated Ship Date 12/10/2024 (If Ordered Today)53 Available from HOLLEY PERFORMANCE PRODUCTS as of 11/22/2024

Model: 4010923

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Description Vehicle Fitment Specifications Reviews (0) Product Q&A Related Products

This Mr. Gasket Rear Main Seal is made from Viton® Rubber. This style of rubber can handle high temperature like silicone rubber, but with superior abrasion resistance. It's durability and design make it recommended for applications that have high engine vacuum, like racing engines that utilize external vacuum pumps for crankcase evacuation.

Features:

Repairs That Leaky Rear Main Sail
Viton® Rubber Offers Both Abrasion Resistance & High Temperature Tolerance
Upgrade for Rope Seal Equipped Cars or Silicone Rubber Main Seals

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.

Make	Model	Submodel	Years	Engine	Fitment Notes
Chevrolet	3100	3100	1959	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Blazer	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	Blazer	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	Blazer	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	Blazer	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	Blazer	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	Blazer	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom Deluxe	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom Deluxe	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom Deluxe	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Custom	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Deluxe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Scottsdale	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10 Suburban	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Big Ten	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Big Ten	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Big Ten	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Cheyenne	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom Deluxe	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom Deluxe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom Deluxe	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom Deluxe	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Custom	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Deluxe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Scottsdale	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C10	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Cheyenne	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Cheyenne	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Cheyenne	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Cheyenne	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Custom	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Custom	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Custom	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Custom	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C15	Sport	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1968	5.0L / 307 / V8 5.3L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1969	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom Deluxe	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom Deluxe	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom Deluxe	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom Deluxe	1980	5.7L / 350 / V8 6.6L / 400 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Custom	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Deluxe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1980	6.6L / 400 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Scottsdale	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1980	5.7L / 350 / V8 6.6L / 400 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20 Suburban	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1980	6.6L / 400 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Cheyenne	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom Deluxe	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom Deluxe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom Deluxe	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom Deluxe	1980	6.6L / 400 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Custom	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Deluxe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1980	6.6L / 400 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Scottsdale	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1980	5.7L / 350 / V8 6.6L / 400 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C20	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Panel	Base	1966	4.1L / 250 / L6	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1966	4.6L / 283 / V8 5.3L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1969	6.5L / 396 / V8 5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Base	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Cheyenne	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom Deluxe	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom Deluxe	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom Deluxe	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Custom	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Deluxe	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Scottsdale	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C30	Silverado	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C35	Base	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C35	Base	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C35	Base	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	C40	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C40	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	C40	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1959	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1969	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1976	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1979	4.4L / 267 / V8 5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1980	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1981	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1982	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Base	1985	5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Classic	1976	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1981	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1982	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Conquista	1985	5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1968	5.4L / 327 / V8 5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1969	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1970	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1971	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1973	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Custom	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Royal Knight	1979	5.7L / 350 / V8 5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Royal Knight	1980	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	Royal Knight	1981	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1971	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1972	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1973	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1980	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1981	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1982	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	El Camino	SS	1985	5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom Deluxe	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom Deluxe	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom Deluxe	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom	1982	5.7L / 350 / V8 6.2L / 379 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Custom	1985	5.7L / 350 / V8 6.2L / 379 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Deluxe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1982	6.2L / 379 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Scottsdale	1985	6.2L / 379 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1982	6.2L / 379 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10 Suburban	Silverado	1985	6.2L / 379 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Cheyenne	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom Deluxe	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom Deluxe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom Deluxe	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Custom	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Deluxe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Scottsdale	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K10	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Panel	Base	1967	5.4L / 327 / V8 4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom Deluxe	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom Deluxe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom Deluxe	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Custom	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Deluxe	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Scottsdale	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20 Suburban	Silverado	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Cheyenne	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom Deluxe	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom Deluxe	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom Deluxe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom Deluxe	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Custom	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Deluxe	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Scottsdale	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K20	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Cheyenne	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Cheyenne	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Cheyenne	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Cheyenne	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Cheyenne	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom Deluxe	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom Deluxe	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom Deluxe	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom Deluxe	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Custom	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Deluxe	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Scottsdale	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K30	Silverado	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Cheyenne	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Cheyenne	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Cheyenne	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Cheyenne	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Cheyenne	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Cheyenne	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom Deluxe	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom Deluxe	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom Deluxe	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom Deluxe	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom Deluxe	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Custom	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Deluxe	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Scottsdale	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	K5 Blazer	Silverado	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
Chevrolet	P10 Series	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	P10 Series	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	P20 Series	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	P20 Series	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	P30 Series	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	P30 Series	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1959	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Suburban	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
Chevrolet	Truck	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1000 Series	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1000 Series	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1000 Series	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1000 Series	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1500 Series	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1500 Series	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1500 Series	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	1500 Series	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	2500 Series	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	2500 Series	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	2500 Series	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	2500 Series	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3000	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	3500	Base	1966	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Base	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Base	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	High Sierra	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	High Sierra	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Classic	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Classic	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Grande	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15 Suburban	Sierra Grande	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C15/C1500 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Base	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	High Sierra	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Classic	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Grande	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Grande	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500 Suburban	Sierra Grande	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Base	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Heavy Half	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Heavy Half	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	High Sierra	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Classic	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Grande	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Grande	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Grande	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Sierra Grande	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Street Coupe	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Street Coupe	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Street Coupe	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C1500	Street Coupe	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C15	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Base	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Heavy Half	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Heavy Half	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	High Sierra	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	High Sierra	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Indy Hauler	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Grande	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Sierra Grande	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C15	Street Coupe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Base	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	High Sierra	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	High Sierra	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Grande	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25 Suburban	Sierra Grande	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1969	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1969	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25/C2500 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Base	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	High Sierra	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Classic	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Grande	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Grande	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500 Suburban	Sierra Grande	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1979	5.7L / 350 / V8 7.4L / 454 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Base	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1979	7.4L / 454 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	High Sierra	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1979	5.7L / 350 / V8 7.4L / 454 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Classic	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Grande	1979	7.4L / 454 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Grande	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C2500	Sierra Grande	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Base	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25	Base	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	High Sierra	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	High Sierra	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Grande	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C25	Sierra Grande	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	C35/C3500 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Base	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	High Sierra	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Classic	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Grande	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Grande	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C3500	Sierra Grande	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Base	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	High Sierra	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	High Sierra	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Classic	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Grande	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	C35	Sierra Grande	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Amarillo	1981	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Amarillo	1982	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Amarillo	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Amarillo	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Amarillo	1985	5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1979	5.0L / 305 / V8 5.7L / 350 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1980	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1981	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1982	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Base	1985	5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Conquista	1981	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1979	5.0L / 305 / V8 5.7L / 350 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1980	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1981	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1982	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Diablo	1985	5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Laredo	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Laredo	1979	4.4L / 267 / V8 5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Laredo	1980	4.4L / 267 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Caballero	Royal Knight	1981	5.0L / 305 / V8 4.4L / 267 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Base	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1980	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	High Sierra	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Classic	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Sierra Grande	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Street Coupe	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Street Coupe	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Street Coupe	1980	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Street Coupe	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Jimmy	Street Coupe	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Base	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	High Sierra	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	High Sierra	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Classic	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Classic	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Grande	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15 Suburban	Sierra Grande	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K15/K1500 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Base	1985	6.2L / 379 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	High Sierra	1985	6.2L / 379 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1979	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Classic	1985	5.7L / 350 / V8 6.2L / 379 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Grande	1979	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Grande	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500 Suburban	Sierra Grande	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1983	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1984	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Base	1985	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	High Sierra	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1981	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1982	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1983	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1984	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Classic	1985	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Grande	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Grande	1981	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K1500	Sierra Grande	1982	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Base	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15	Base	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	High Sierra	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15	High Sierra	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K15	Indy Hauler	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Grande	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K15	Sierra Grande	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Base	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Base	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	High Sierra	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	High Sierra	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Grande	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25 Suburban	Sierra Grande	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1968	5.0L / 307 / V8 5.4L / 327 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1969	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1967	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K25/K2500 Suburban	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Base	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	High Sierra	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Classic	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Grande	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Grande	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500 Suburban	Sierra Grande	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Base	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	High Sierra	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Classic	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Grande	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Grande	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K2500	Sierra Grande	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Base	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Base	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K25	Base	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K25	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	High Sierra	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	High Sierra	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	High Sierra	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Classic	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Classic	1977	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Classic	1978	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Grande	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Grande	1976	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Grande	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K25	Sierra Grande	1978	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	K35/K3500 Pickup	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Base	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	High Sierra	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1983	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1984	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Classic	1985	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Grande	1979	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Grande	1980	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Grande	1981	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K3500	Sierra Grande	1982	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	Base	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	Base	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	High Sierra	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	High Sierra	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	Sierra Classic	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	Sierra Classic	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	Sierra Grande	1977	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	K35	Sierra Grande	1978	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1976	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Base	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Classic	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Classic	1976	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Classic	1977	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Custom	1972	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Custom	1973	5.7L / 350 / V8 5.0L / 307 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Custom	1974	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	High Sierra	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	SP	1975	5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	SP	1976	5.0L / 305 / V8 5.7L / 350 / V8	Recommended for use with external vacuum pump.
GMC	Sprint	Sierra Madre Del Sur	1976	5.7L / 350 / V8 5.0L / 305 / V8	Recommended for use with external vacuum pump.
GMC	Suburban	Base	1960	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	Suburban	Base	1961	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	Suburban	Base	1962	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	Suburban	Base	1963	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	Suburban	Base	1964	4.6L / 283 / V8	Recommended for use with external vacuum pump.
GMC	Suburban	Base	1965	4.6L / 283 / V8	Recommended for use with external vacuum pump.

Specifications:

Emission Code	5
Engine	Chevrolet Small Block Gen I
Material	Viton
Part Type	Engine Main Bearing Gasket Set
Product Type	Rear Main Seal
Rear Main Seal Style	Two Piece
Warranty	Limited 90 Day
Weight	0.1000

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