- 2025–2027 Factory-verified
2027: O on all trims
RGC Factory-verified
Also documented for Chevrolet
Documented applications
- 2025–2027 Factory-verified
2027: O on all trims
This page aggregates every documented appearance of RGC in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.