GM Full Size Vans 1967-1986 Repair Guide

Vehicle

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See Figure 1



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Fig. Fig. 1: The Vehicle Identification Number (VIN) is visible through the windshield-1979 and later models

The vehicle identification number (VIN) on models through 1978 is on a plate fastened to the left door frame. On 1979 and later models, the VIN. plate is mounted on the driver's side of the instrument panel, and is visible through the windshield. The gross vehicle weight (GVW) or maximum safe total weight of the vehicle, cargo, and passengers is usually also given on the plate through 1978.

1967-69 MODELS



The first letter is the chassis type: G for van. The second letter identifies the engine: S for 6-cyl. and E for V8. The first number gives the load capacity (GVW) range: 1 for under 5,600 lbs. (2542 kg), 2 for over 5,500 lbs. (2497 kg). The second and third numbers are the cab to axle measurement code. The fourth and fifth numbers (letters for GMC) are a body style code. The sixth number is the last digit of the model year: 9 for 1969. The next number indicates the assembly plant. The remaining numbers are the vehicle's individual serial number.

1970-71 MODELS



The first letter is the chassis type: G for van. The second letter identifies the engine: S for 6-cyl. and E for V8. The first number gives the load capacity (GVW) range: 1 for under 5,500 lbs. (2497 kg), 2 for 5500-8,100 lbs. (2497-3677 kg), and 3 for 6,700-10,000 lbs. (3041-4540 kg The next number or two numbers indicates the body style: 5 for van, 26 for Custom Sportvan, and 36 for Deluxe Sportvan. The next number is the last digit of the model year: as 1 for 1971. The next letter indicates the assembly plant. The remaining numbers are the vehicle's individual serial number.

1972-80 MODELS



The first letter indicates a Chevrolet (C) or GMC (T) vehicle. The second letter is the chassis type: G for van. The third letter identifies the engine. For 1972, it was S for 6-cyl. and E for V8. For 1973-80, it is:



Q-250 six through 1975
 
D-250 six from 1976
 
N-262 4 bbl V6
 
T-292 six
 
U-305 V8
 
X-307 V8
 
V-350 2 bbl V8
 
Y, L-350 4 bbl V8
 
U-400 V8 through 1976
 
R-400 V8 from 1977
 

The first number gives the load capacity range: 1 for 1 / 2 ton (453.59 kg), 2 for 3 / 4 ton (608.38 kg), and 3 for 1 ton (907.18 kg). The second number is 5 for van body. The third number is the last digit of the model year: as 6 for 1976. The next letter indicates the assembly plant. The remaining numbers are the vehicle's individual serial number.

1981-86 MODELS



See Figure 2



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Fig. Fig. 2: Common 17 digit Vehicle Identification Number (VIN)-1981 models shown

Beginning in 1981 a new 17 digit code is used. The interpretation is the same as previous years except that the engine code is the eighth digit. Additional engines/codes include the 305 V8 (F and H codes); a 350 V8 (P code); a W-code 454 V8 and a Chevrolet built 379 cu. in. V8 diesel, in both C and J codes.

 
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