- 2025–2027 Factory-verified
2025–2026: O on all trims; 2027: Preferred, Sport Touring: O; Avenir: S; 2026–2027 wording adds 3 years of OnStar One with Super Cruise upgrade; included in WQ1
UKL Factory-verified
Also documented for CadillacChevroletGMC
Documented applications
This page aggregates every documented appearance of UKL in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.