- 2024–2027 Factory-verified
2025: Elevation 4WD, AT4, Denali: S; Elevation 2WD: not offered; 2026–2027: Elevation 4WD, AT4, AT4X, Denali: S; Elevation 2WD: not offered
C6X Factory-verified
Also documented for BuickChevroletPontiac
Documented applications
This page aggregates every documented appearance of C6X in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.