Chevrolet Full Size Cars 1979-1989

Vacuum Diagrams

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Below is a listing of 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 car's original equipment, refer to the diagrams below for the same or similar configuration.



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Fig. Fig. 1 1979 200 CID (3.3L) federal



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Fig. Fig. 2 1979 200 CID (3.3L) federal alternate



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Fig. Fig. 3 1979 250 CID (4.1L) California



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Fig. Fig. 4 1979 250 CID (4.1L) federal



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Fig. Fig. 5 1979 267 CID (4.4L) federal



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Fig. Fig. 6 1979 305 CID (5.0L) federal



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Fig. Fig. 7 1979 305 CID (5.0L) California



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Fig. Fig. 8 1979 305 CID (5.0L) federal alternate



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Fig. Fig. 9 1979 305 CID (5.0L) high altitude



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Fig. Fig. 10 1979 305 CID (5.0L) California alternate



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Fig. Fig. 11 1979 350 CID (5.7L) federal



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Fig. Fig. 12 1979 350 CID (5.7L) California



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Fig. Fig. 13 1979 350 CID (5.7L) California alternate



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Fig. Fig. 14 1979 350 CID (5.7L) high altitude



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Fig. Fig. 15 1980 3.8L V6 engine federal



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Fig. Fig. 16 1980 4.4L V8 engine federal



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Fig. Fig. 17 1980 5.0L V8 engine federal



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Fig. Fig. 18 1980 5.0L V8 engine California



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Fig. Fig. 19 1980 5.7L V8 engine federal



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Fig. Fig. 20 1981 267 (4.4L) V8 engine federal



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Fig. Fig. 21 1981 229 (3.8L) V6 engine



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Fig. Fig. 22 1981 229 (3.8L) V6 engine alternate



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Fig. Fig. 23 1981 305 (5.0L)V8 engine



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Fig. Fig. 24 1981 305 (5.0L) V8 engine alternate



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Fig. Fig. 25 100 1982 231 (3.8L) V6 engine



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Fig. Fig. 26 1983 229 (3.8L) V6 engine federal and high altitude



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Fig. Fig. 27 1983 231 (3.8L) V6 engine California



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Fig. Fig. 28 1983 231 (3.8L) V6 engine federal



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Fig. Fig. 29 1983 305 (5.0L) V8 engine California



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Fig. Fig. 30 1983 305 (5.0L) V8 engine except California



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Fig. Fig. 31 1983 350 (5.7) V8 engine federal



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Fig. Fig. 32 1984 231 (3.8L) V6 engine California



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Fig. Fig. 33 1984 231 (3.8L) V6 engine federal



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Fig. Fig. 34 1984 231 (3.8L) V6 engine Canada



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Fig. Fig. 35 1984 231 (3.8L) V6 engine export



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Fig. Fig. 36 1984 305 (5.0L) V8 engine Canada



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Fig. Fig. 37 1984 305 (5.0L) V8 engine California alternate



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Fig. Fig. 38 1984 307 (5.0L) Oldsmobile V8 engine California



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Fig. Fig. 39 1984 307 (5.0L) Oldsmobile V8 engine California alternate



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Fig. Fig. 40 1984 307 (5.0L) Oldsmobile V8 engine federal



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Fig. Fig. 41 1984 307 (5.0L) Oldsmobile V8 engine federal alternate



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Fig. Fig. 42 1984 350 (5.7L) V8 engine Canada



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Fig. Fig. 43 1984 350 (5.7L) V8 engine Canada alternate



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Fig. Fig. 44 1985 262 (4.3L) V6 engine federal TBI



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Fig. Fig. 45 1985 262 (4.3L) V6 engine California TBI



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Fig. Fig. 46 1985 305 (5.0L) V8 engine federal



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Fig. Fig. 47 1985 305 (5.0L) V8 engine California



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Fig. Fig. 48 1985 305 (5.0L) V8 engine Canada



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Fig. Fig. 49 1985 305 (5.0L) V8 engine export



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Fig. Fig. 50 1986 262 (4.3L) V6 engine federal TBI



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Fig. Fig. 51 1986 262 (4.3L) V6 engine federal TBI alternate



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Fig. Fig. 52 1986 262 (4.3L) V6 engine California TBI



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Fig. Fig. 53 1986 262 (4.3L) V6 engine California TBI alternate



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Fig. Fig. 54 1986 305 (5.0L) V8 engine federal



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Fig. Fig. 55 1986 305 (5.0L) V8 engine federal alternate



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Fig. Fig. 56 1986 305 (5.0L) V8 engine federal alternate



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Fig. Fig. 57 1986 305 (5.0L) V8 engine California



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Fig. Fig. 58 1986 305 (5.0L) V8 engine California alternate



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Fig. Fig. 59 1986 305 (5.0L) V8 engine Canada



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Fig. Fig. 60 1986 305 (5.0L) V8 engine Canada alternate



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Fig. Fig. 61 1986 305 (5.0L) V8 engine federal alternate



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Fig. Fig. 62 1986 305 (5.0L) V8 engine California alternate



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Fig. Fig. 63 1988 305 (5.0L) V8 engine federal



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Fig. Fig. 64 1988 305 (5.0L) V8 engine California



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Fig. Fig. 65 1988 305 (5.0L) V8 engine Canada



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Fig. Fig. 66 1988 305 (5.0L) V8 engine Canada alternate



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Fig. Fig. 67 1989 262 (4.3L) V6 TBI engine federal



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Fig. Fig. 68 1989 262 (4.3L) V6 TBI engine California



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Fig. Fig. 69 1989 305 (5.0L) V8 TBI engine federal



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Fig. Fig. 70 1989 305 (5.0L) V8 TBI engine California



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Fig. Fig. 71 1989 305 (5.0L) V8 TBI engine federal alternate



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Fig. Fig. 72 1989 305 (5.0L) V8 TBI engine California alternate



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Fig. Fig. 73 1989 305 (5.0L) V8 TBI engine export without catalyst



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Fig. Fig. 74 1989 307 (5.0L) Oldsmobile V8 engine federal



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Fig. Fig. 75 1989 307 (5.0L) Oldsmobile V8 engine Canada

 
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