- 2025–2026 Factory-verified
touch-up WA-136H; premium paint on Preferred; not available on Sport Touring; new for 2025; 2026: GM Authority gives the same code
GXP Factory-verified
Also documented for CadillacChevroletGMC
Documented applications
This page aggregates every documented appearance of GXP in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.