- 2027 Factory-verified
additional charge; not available at the start of production; touch-up WA-243L
G4M Factory-verified
Also documented for CadillacChevrolet
Documented applications
- 2027 Factory-verified
Denali and Denali Ultimate only; not available with AT4 or AT4X or the Twilight Harbor interior; late availability; extra charge; touch-up WA-243L
This page aggregates every documented appearance of G4M in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.