- 2001, 2003–2007 Factory-verified
2005–2007: heavy-duty models only (GM’s HD list)
HVY Factory-verified
Also described as Identification, 2 inch body raise, heavy-duty modelIdentification, 2 inch body raise, HD model
Also documented for Chevrolet
Documented applications
- 2001, 2003–2007 Factory-verified
- 2007–2008 Factory-verified
- 2001 Factory-verified
This page aggregates every documented appearance of HVY in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.