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    1964 Cadillac Sixty-Two 7.0L 4BL 8cyl

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    GM Camaro 1967-1981 Repair Guide

    VACUUM DIAGRAMS

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    Following are vacuum diagrams for most of the engine and emissions package combinations covered by this guide. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label, if present. Should the label be missing, or should vehicle be equipped with a different engine from the vehicle's original equipment, refer to the following diagrams for the same or similar configuration.

    If you wish to obtain a replacement emissions label, most manufacturers make the labels available for purchase. The labels can usually be ordered from a local dealer.

    See Figures 1 through 44



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    Fig. Fig. 1: Vapor control hose schematic-1970 models



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    Fig. Fig. 2: Vacuum hose schematic-1971 V8 engines



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    Fig. Fig. 3: Vapor control hose schematic-1971 models



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    Fig. Fig. 4: Vapor control hose schematic-1972 models



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    Fig. Fig. 5: Optional engine vapor control schematic for C-60, LS-3, L-48 and Z-28 options-1972 models



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    Fig. Fig. 6: Vapor control hose schematic-1973 6-cylinder engines



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    Fig. Fig. 7: EFE system hose schematic-1976 6-cylinder engines



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    Fig. Fig. 8: Vacuum hose schematic-1976 small block V8 engines with 2-bbl. carburetors



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    Fig. Fig. 9: Vacuum hose schematic-1976 small block V8 engines with 4-bbl. carburetors and EFE and air injection systems



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    Fig. Fig. 10: Vacuum hose schematic-1976 small block V8 engines with 4-bbl. engines (without EFE and air injection systems)



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    Fig. Fig. 11: Vacuum hose schematic-1977 6-cylinder Federal and high altitude engines



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    Fig. Fig. 12: Vacuum hose schematic-1977 6-cylinder California engines



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    Fig. Fig. 13: Vacuum hose schematic-1977 305 cid 2-bbl. high altitude engines



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    Fig. Fig. 14: Vacuum hose schematic-1977 305 cid 2-bbl. Federal engines



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    Fig. Fig. 15: Vacuum hose schematic-1977 305 cid 2-bbl. California engines



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    Fig. Fig. 16: Vacuum hose schematic-1977 350 cid 4-bbl. Federal engines



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    Fig. Fig. 17: Vacuum hose schematic-1977 350 cid 4-bbl. high altitude engines



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    Fig. Fig. 18: Vacuum hose schematic-1978 6-cylinder Federal and high altitude engines



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    Fig. Fig. 19: Vacuum hose schematic-1978 6-cylinder California engines



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    Fig. Fig. 20: Vacuum hose schematic-1978 305 cid low altitude engines



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    Fig. Fig. 21: Vacuum hose schematic-1978 305 cid high altitude engines



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    Fig. Fig. 22: Vacuum hose schematic-1978 305 cid California engines



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    Fig. Fig. 23: Vacuum hose schematic-1978 350 cid Federal engines



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    Fig. Fig. 24: Vacuum hose schematic-1978 350 cid California engines



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    Fig. Fig. 25: Vacuum hose schematic-1979 6-cylinder California engines



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    Fig. Fig. 26: Vacuum hose schematic-1979 6-cylinder Federal engines



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    Fig. Fig. 27: Vacuum hose schematic-1979 305 cid 1-bbl. Federal engines



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    Fig. Fig. 28: Vacuum hose schematic-1979 305 cid 2-bbl. Federal engines



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    Fig. Fig. 29: Vacuum hose schematic-1979 305 cid 4-bbl. Federal engines



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    Fig. Fig. 30: Vacuum hose schematic-1979 305 cid 2-bbl. California engines



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    Fig. Fig. 31: Vacuum hose schematic-1979 305 cid 2-bbl. California engines with air injection



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    Fig. Fig. 32: Vacuum hose schematic-1979 305 cid 4-bbl. California engines



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    Fig. Fig. 33: Vacuum hose schematic-1979 305 cid 4-bbl. high altitude engines



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    Fig. Fig. 34: Vacuum hose schematic-1979 350 cid Federal engines



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    Fig. Fig. 35: Vacuum hose schematic-1979 350 cid 2-bbl. California engines



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    Fig. Fig. 36: Vacuum hose schematic-1979 350 cid 4-bbl. California engine



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    Fig. Fig. 37: Vacuum hose schematic-1979 350 cid high altitude engines



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    Fig. Fig. 38: Vacuum hose schematic-1980 6-cylinder 2-bbl. Federal engines with automatic transmissions



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    Fig. Fig. 39: Vacuum hose schematic-1980 6-cylinder 4-bbl. Federal engines with automatic transmissions



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    Fig. Fig. 40: Vacuum hose schematic-1980 305 cid California engines (except Z28 models)



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    Fig. Fig. 41: Vacuum hose schematic-1980 305 cid California engines (Z28 models)



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    Fig. Fig. 42: Vacuum hose schematic-1980 350 cid Federal engines with automatic transmissions



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    Fig. Fig. 43: Evaporative Emission System (EECS) vacuum hose schematic-1981 closed canister system



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    Fig. Fig. 44: Evaporative Emission System (EECS) vacuum hose schematic-1981 open canister system

     
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