- 2026 Factory-verified
touch-up WA-234K; 2026: Black/Artemis interior only; late availability; extra charge; Sierra EV reads "Paint, Magnus Gray Matte"
GBL Factory-verified
Also documented for CadillacGMC
Documented applications
This page aggregates every documented appearance of GBL in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.