Factory build sheet
1981 Pontiac Firebird
Build 223678U1-9
VIN positions 1 through 8 read 223678U1 and position 10 reads 9. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every Firebird whose VIN starts 223678U1 and carries 9 in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 1 of them.
- Decoded Jul 7, 2026
- 1 known VINs
- 1 listed for sale now
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 | 223 | World manufacturer identifier |
| 4–8 | 678U1 | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | 9 | Model year — 1981 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
1 vehicles carry this build
Every VIN we have decoded to 223678U1-9 shares the specification above.
- 1 Known VINs
- 1 Listed for sale now
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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 1 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.