GM Cutlass RWD 1970-1987 Repair Guide

VACUUM DIAGRAMS

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Following is a listing of vacuum diagrams for most of the engine and emissions package combinations covered by this information. 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 the vehicle be equipped with an engine other than the original, 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 67





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Fig. Fig. 1: Abbreviations used in Oldsmobile vacuum circuits

 


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Fig. Fig. 2: 1976 49-state 350 4-bbl

 


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Fig. Fig. 3: 1976 Calif. 350 4-bbl with 241 axle and 1976 49-state 455 4-bbl

 


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Fig. Fig. 4: 1976 Calif. 350 4-bbl

 


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Fig. Fig. 5: 1976 Calif. 455 4-bbl

 


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Fig. Fig. 6: 1976 49-state 260 2-bbl MT

 


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Fig. Fig. 7: 1976 Calif. 260 2-bbl MT

 


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Fig. Fig. 8: 1976 49-state 260 2-bbl AT

 


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Fig. Fig. 9: 1976 Calif. 260 2-bbl AT 1st type

 


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Fig. Fig. 10: 1976 Calif. 260 2-bbl AT 2nd type

 


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Fig. Fig. 11: Vacuum hose routing 260 CID AT all except high altitude and California

 


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Fig. Fig. 12: Vacuum hose routing 260 CID w/5 spd. M.T. all except high altitude and California

 


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Fig. Fig. 13: Vacuum hose routing 350 and 403 all except high altitude and California

 


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Fig. Fig. 14: Vacuum hose routing 350 and 403

 


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Fig. Fig. 15: Vacuum hose routing 350 and 403 California

 


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Fig. Fig. 16: 1978 49-states - 350 VIN code R and 403 V8

 


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Fig. Fig. 17: 1978 Calif. 350 VIN code R and 403 V8

 


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Fig. Fig. 18: 1978 Alt-350 VIN code R and 403 V8

 


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Fig. Fig. 19: 1978 Calif. - 231 V6

 


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Fig. Fig. 20: 1979 49 states - 305 V8

 


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Fig. Fig. 21: 1978 49 states and Alt - 231 V6

 


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Fig. Fig. 22: 1978 Calif. and Alt - 305 V8

 


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Fig. Fig. 23: 1979 231 V6 - Calif. Alt (with AT)

 


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Fig. Fig. 24: 1979 231 V6 - Calif. (with AT)

 


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Fig. Fig. 25: 1979 260 V8 - Except Calif. and Alt (with AT)

 


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Fig. Fig. 26: 1979 231 V6 - Except Calif. and Alt (with AT)

 


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Fig. Fig. 27: 1979 260 V8 - Except Calif. and Alt (with AT)

 


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Fig. Fig. 28: 1979 231 V6 - Except Calif. and Alt (with MT)

 


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Fig. Fig. 29: 1979 260 V8 - Alt (with AT)

 


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Fig. Fig. 30: 1979 260 V8 - Calif. (with AT)

 


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Fig. Fig. 31: 1979 305 V8 VIN code G - Except Calif. and Alt

 


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Fig. Fig. 32: 1979 305 V8 VIN code G - Calif.

 


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Fig. Fig. 33: 1979 305 V8 VIN code H and 350 V8 VIN code L - Calif. and Alt

 


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Fig. Fig. 34: 1979 305 V8 VIN code G - Except Calif. and Alt

 


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Fig. Fig. 35: 1979 305 V8 VIN code H - Except Calif. and Alt

 


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Fig. Fig. 36: 1979 350 V8 VIN code R and 403 V8 VIN code K - Except Calif. and Alt

 


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Fig. Fig. 37: 1978 49-states - 260 V8 (with 5 spd. trans.)

 


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Fig. Fig. 38: 1978 Calif. - 260 V-8

 


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Fig. Fig. 39: 1979 350 V8 VIN code R and 403 V8 VIN code K - Calif.

 


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Fig. Fig. 40: 1978 Alt - 260 V8 (with AT)

 


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Fig. Fig. 41: 1978 49-states and Alt - 260 V8

 


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Fig. Fig. 42: 1980 - Diesel Eng.

 


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Fig. Fig. 43: 1981 - V6 231 cu. in. (3.8L)

 


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Fig. Fig. 44: 1981 - V8 305 cu. in. (5.0L)

 


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Fig. Fig. 45: 1982 V8 267 cu. in. (4.4L)

 


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Fig. Fig. 46: 1983 V8-3.8L VIN 9 2-bbl, AT - FEDERAL & HIGH Alt

 


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Fig. Fig. 47: 1983 V6-3.8L VIN 8 2-bbl, AT

 


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Fig. Fig. 48: 1983 V6-3.8L VIN A 2-bbl, AT - CALIF.

 


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Fig. Fig. 49: 1983 V6-3.8L VIN A 2-bbl, AT - FEDERAL

 


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Fig. Fig. 50: 1983 V6-4.3L VIN T and V DIESEL, AT, W/REV FLOW EGR - FEDERAL &CALIF.

 


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Fig. Fig. 51: 1983 V8-VIN H 4-bbl, AT - CALIF.

 


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Fig. Fig. 52: 1983 V8-5.0L VIN H and 7 4-bbl, AT - EXC. CALIF.

 


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Fig. Fig. 53: 1983 V8-5.0L VIN 9 4-bbl, AT - ALL HURST OLDS.

 


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Fig. Fig. 54: 1983 V8-5.0L VIN 9 4-bbl, AT - ALL EXC. HURST OLDS.

 


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Fig. Fig. 55: 1984 V6-3.8L VIN A 2-bbl, AT - - FEDERAL

 


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Fig. Fig. 56: 1984 V6-3.8L VIN A 2-bbl, AT - CALIF

 


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Fig. Fig. 57: 1984 V6-3.8L VIN A 2-bbl, AT - CANADA

 


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Fig. Fig. 58: 1984 V6-3.8L VIN A 2-bbl, AT - EXPORT

 


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Fig. Fig. 59: 1984 V6-4.1L VIN 4 4-bbl, AT - FEDERAL

 


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Fig. Fig. 60: 1984 V6-4.3L VIN V DIESEL, AT - CALIF.

 


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Fig. Fig. 61: 1984 V6-4.1L VIN 4 4-bbl AT - CALIF.

 


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Fig. Fig. 62: 1984 V-4.3L VIN T and V DIESEL, AT - FED. HIGH ALT.

 


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Fig. Fig. 63: 1984 V8-5.0L VIN H 4-bbl, AT - EXPORT

 


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Fig. Fig. 64: 1984 V8-5.0L VIN H 4-bbl, AT - FEDERAL.

 


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Fig. Fig. 65: 1984 V8-5.0L VIN H 4-bbl, AT - FEDERAL

 


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Fig. Fig. 66: 1984 V8-5.0L VIN Y 4-bbl, MAN and AT - CALIF.

 


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Fig. Fig. 67: 1984 V8-5.0L VIN Y 4-bbl, MAN and AT - FEDERAL

 

 
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