- 2026–2027 Factory-verified
2027: Elevation, AT4, Denali, Denali Ultimate: O; includes VQQ, VTB
RFO Factory-verified
Also documented for Chevrolet
Documented applications
- 2026–2027 Factory-verified
2027: Elevation, Denali, Denali Ultimate: O; includes VQQ, VTB
This page aggregates every documented appearance of RFO in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.