| VIN Range | 1G1YY2386M5100001 – 1G1YY2386M5118595 (Corvette Coupe & Convertible) 1G1YZ23J6M5800001 – 1G1YZ23J6M5802044 (ZR-1 Corvette) |
| 1 (First Digit) | 1 – United States |
| G (Second Digit) | Manufacturer. G – General Motors |
| 1 (Third Digit) | Manufacturer Division. 1 – Chevrolet |
| YY/YZ(ZR-1) | Make of Car. YY – Corvette Coupe/Convertible. YZ – ZR-1 Corvette (Coupe Only) |
| 2/3 (Sixth Digit) | 2 – Two Door Hatchback Coupe, 3 – Two Door Convertible |
| 3 (Seventh Digit) | Type of Restraint System. 3 – Passive Restraint System. |
| 8/J (ZR-1) | Type of Engine. 8 – L98: 5.7 Liter, 350CI Engine with Tuned-Port Injection. J – LT5: 5.7 Liter, 350CI, 32 Valve Engine with Tuned-Port Injection |
| 0/6 (ZR-1) | Check Digit. |
| M (Tenth Digit) | The Model Year. J – 1991 |
| 5 (Eleventh Digit) | Location of the Assembly Plant. 5 – Bowling Green, Kentucky |
| 1XXXXX (Twelfth thru Seventeenth Digits) | Production Sequence Numbers. |
The last six digits begin at 100001 and run thru 118595, accounting for each of the 18,595 Corvette Coupes/Convertibles built in 1991. Additionally, the last six digits of the ZR-1 VIN begin at 800001 and run thru 803049, accounting for each of the 2,044 ZR-1 Corvette Coupes built in 1991. Each Vehicle Identification Number (VIN) is unique to an individual car.
For all 1991 Corvettes, the Vehicle Identification Number was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.
Check Digit is used to calculate the characters in the serial number and gives it a single digit code that can be used to verify the serial number is legitimate. (Note: The Check digit number varies depending on each specific VIN number.)
