GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Vehicle

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See Figures 1, 2, 3, 4, 5, 6 and 7

The Vehicle Identification Number (VIN) is important for ordering parts and for servicing. The VIN is a thirteen digit (1975-1980) or seventeen digit (1981 and later) sequence of numbers and letters visible on a plate fastened to the upper left instrument panel area, seen through the windshield.

Model years appear in the VIN as the last digit of each particular year (6 is 1976, 8 is 1978,etc.), until 1980 (which is A). This is the final year under the thirteen digit code. The seventeen digit VIN begins with 1981 (B), and continues 1982 (C) and so on, except letters which may be confused with numbers (I, O or Q are skipped). Because of this, 1987 is represented by (H) while 1988 is (J) and 1989 is (K).



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Fig. Fig. 1: Thirteen digit VIN, 1975-1980



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Fig. Fig. 2: Seventeen digit VIN, 1981 and later.



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Fig. Fig. 3: VIN plate location.



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Fig. Fig. 4: The body identification plate can be used to determine the original paint and trim combinations. U.S. models is shown here.



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Fig. Fig. 5: Body number plate-Canadian models



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Fig. Fig. 6: Close-up view of the VIN plate



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Fig. Fig. 7: These labels are located on the inside of the drivers door and provide the date of manufacture and other information

 
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