For OBD information for all GM vehicles please see our GM OBD / OBD2 page.
If you cannot find your model below and it is newer than 1996, please refer to our list of all Buick OBD2 codes. NOTE: A model specific code list like those below will be the most accurate source for manufacturer specific OBD / OBD2 codes of your vehicle.
| Model | Year | Engine identification | System |
|---|---|---|---|
| Century 2.2L | 1996 | VIN Position 8=4 | GM |
| Century 3.1L | 1994-05 | VIN Position 8=M/J | GM |
| Enclave 3.6L | 2008-09 | VIN Position 8=7/V | GM |
| LaCrosse 3.6L | 2005-09 | VIN Position 8=7 | GM |
| LaCrosse 3.8L | 2005-09 | VIN Position 8=2/4 | GM |
| LaCrosse 5.3L | 2008-09 | VIN Position 8=C | GM |
| LeSabre 3.8L | 1994-05 | VIN Position 8=L/K | GM |
| Lucerne 3.8L | 2006-08 | VIN Position 8=1/K | GM |
| Lucerne 3.9L | 2009 | VIN Position 8=1/M | GM |
| Lucerne 4.6L | 2006-09 | VIN Position 8=9/Y | GM |
| Park Avenue 3.8L | 1994-05 | VIN Position 8=L/K/1 | GM |
| Rainier 4.2L | 2004-07 | VIN Position 8=S | GM |
| Rainier 5.3L | 2004-07 | VIN Position 8=M/P | GM |
| Regal 3.1L | 1996-97 | VIN Position 8=M | GM |
| Regal 3.8L | 1994-04 | VIN Position 8=L/K/1 | GM |
| Rendezvous 3.4L | 2002-05 | VIN Position 8=E | GM |
| Rendezvous 3.5L | 2006-07 | VIN Position 8=8 | GM |
| Rendezvous 3.6L | 2004-06 | VIN Position 8=7 | GM |
| Riviera 3.8L | 1995-99 | VIN Position 8=K/1 | GM |
| Roadmaster 5.7L | 1996 | VIN Position 8=P | GM |
| Skylark 2.4L | 1996-98 | VIN Position 8=T | GM |
| Skylark 3.1L | 1996-98 | VIN Position 8=M | GM |
| Terraza 3.5L | 2005-07 | VIN Position 8=8/L | GM |
| Terraza 3.9L | 2006-07 | VIN Position 8=1 | GM |