- 2022–2023, 2025–2027 Factory-verified
2027: AT4 Ultimate, Denali, Denali Ultimate: S; Elevation, AT4: O
DCH Factory-verified
Also documented for Chevrolet
Documented applications
- 2022–2023, 2025–2027 Factory-verified
2027: AT4 Ultimate, Denali, Denali Ultimate: S; Elevation, AT4: O
This page aggregates every documented appearance of DCH in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.