1981 Corvette Identification Numbers
Below, you can find Vehicle Identification Number, casting dates, casting numbers, and other information for identifying the 1981 Corvette.
| VIN Tag Information | |
|---|---|
| 1G1AY8764BS400001 - 1G1AY8764BS431611 (St.Louis) 1G1AY8764B5100001 - 1G1AY8764B5108995 (B.Green) |
|
| Digit | Definition |
| 1st | 1 = Nation Origin = US |
| 2nd | G = Manufacturer = GM |
| 3rd | 1 = Make/Type = Chevy/Passenger |
| 4th | Vehicle Restraint System: A = Manual Belts, B = Automatic Belts, C = Air Bags |
| 5th | Y = Carline = Corvette |
| 6th/7th | 87 = Body Type = Corvette |
| 8th | 6 = Engine Type = L81 |
| 9th | Check digit to verify VIN# |
| 10th | B = Model Year = 1981 |
| 11th | Assembly Plant: S = St. Louis, MO, 5 = Bowling Green, KY |
| Last 6 digits | Production Number starting with 400001 and up. |
| Engine Suffix ID Numbers | |
|---|---|
| ZDA: | 350ci, 190hp (manual transmission) |
| ZDB: | 350ci, 190hp (automatic transmission, California Emissions) |
| ZDC: | 350ci, 190hp (manual transmission, California Emissions) |
| ZDD: | 350ci, 190hp (automatic transmission) |
| Block ID Numbers | |
|---|---|
| 14010207: | All Engines |
| Head ID Numbers | |
|---|---|
| 462624: | 350ci, 190hp, Valve Size (in.) Intake/Exhaust: 1.94/1.50, Combustion Chamber (cc.): 75.47 |
Cylinder Head Casting Number:
The cylinder head casting number is usually found on top of the cylinder head in between two valves and the rocker arm studs.
Cylinder Head Casting Date:
The cylinder head casting date is usually found adjacent to the cylinder head casting number. The casting date code is an alphanumeric sequenced number. The first digit is usually a letter which specifies the month that the block was cast. Some casting dates have been found with all digits being numbers, the first of which corresponds to the month.
| Cylinder Head Casting Number Month Codes (1st Digit) | ||
|---|---|---|
| A - January | E - May | I - September |
| B - February | F - June | J - October |
| C - March | G - July | K - November |
| D - April | H - August | L - December |
Two main plants were casting Chevrolet engine parts during 1972: Flint, Michigan and Tonawanda, New York.
Example: Flint Cylinder Head Casting Number - D 19 9
- D: Month = April
- 19: Casting Day = 19th
- 9: Casting Year = 1959
Example: Tonawanda Cylinder Head Casting Number - D 19 59
- D: Month = April
- 19: Casting Day = 19th
- 59: Casting Year = 1959
| Alternator ID Numbers | |
|---|---|
| 1101075, 1101085, 1103088, 1103091, 1103103 |
| Carburetor ID Numbers | |
|---|---|
| Rochester Q-Jet #17081217: | 350ci, 190hp (manual transmission) |
| Rochester Q-Jet #17081218: | 350ci, 190hp (automatic transmission, California Emissions) |
| Rochester Q-Jet #17081228: | 350ci, 190hp (automatic transmission) |
| Distributor ID Numbers | |
|---|---|
| 1103443: | All Engines |
Window Sticker:
Below is an example of a 1982 Corvette window sticker:
