- 2004–2007 Factory-verified
2005–2007: heavy-duty models only (GM’s HD list)
QC1 Factory-verified
Also described as Wheels, 16 x 7 steel
Also documented for CadillacChevroletPontiac
Documented applications
- 2009 Factory-verified
- 2004–2007 Factory-verified
- 2007–2009 Factory-verified
- 2009 Factory-verified
This page aggregates every documented appearance of QC1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.