- 2025–2027 Factory-verified
2025: O on all trims; 2026: Denali Ultimate: S; Elevation, AT4, Denali: O; 2027: Denali, Denali Ultimate: S; Elevation, AT4: O; includes UKL, UKZ and ULM
WQ1 Factory-verified
Also documented for Buick
Documented applications
This page aggregates every documented appearance of WQ1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.