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 Hummer 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 |
|---|---|---|---|
| H2 6.0L | 2003-07 | VIN position 8 =U | GM |
| H2 6.2L | 2008-09 | VIN position 8 =8 | GM |
| H3 3.5L | 2006-07 | VIN position 8 =6 | GM |
| H3 3.7L | 2007-09 | VIN position 8 =E | GM |
| H3 5.3L | 2008-09 | VIN position 8 =L | GM |
| H3T 3.7L | 2009 | VIN position 8 =E | GM |
| H3T 5.3L | 2009 | VIN position 8 =L | GM |