Factory build sheet
1981 Pontiac Firebird Formula
Build 1G2AV87W-B · 5L 8cyl · Coupe
VIN positions 1 through 8 read 1G2AV87W and position 10 reads B. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Firebird whose VIN starts 1G2AV87W and carries B in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 2 of them.
- Decoded Jul 7, 2026
- 2 known VINs
Factory specification
As filed by Pontiac with NHTSA for this build. Fields the filing does not record are left out entirely — a missing row means no recorded value, not a missing feature.
Engine
- Displacement
- 5 L
- Displacement (CI)
- 301
- Cylinders
- 8
- Configuration
- V-Shaped
- Engine model
- 4BBL
- Fuel type
- Gasoline
Body & chassis
- Body class
- Coupe
- NHTSA body type
- PASSENGER CAR
- Doors
- 2
- Manufacturer
- GENERAL MOTORS LLC
How this VIN pattern is read
A 17-character VIN carries two kinds of information: what was built, and which one it is. This page is the first kind — the nine highlighted positions.
| Positions | Characters | What they encode |
|---|---|---|
| 1–3 | 1G2 | GENERAL MOTORS LLC · World manufacturer identifier |
| 4–8 | AV87W | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | B | Model year — 1981 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
2 vehicles carry this build
Every VIN we have decoded to 1G2AV87W-B shares the specification above.
- 2 Known VINs
Keep going
Where this data comes from
Specification fields are decoded from the manufacturer's filings in the NHTSA vPIC database, keyed on VIN positions 1–8 and 10. We publish the filed values as they stand and leave out anything the filing does not record.
Vehicle counts come from the 2 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.