- 2019 Factory-verified
touch-up WA-630D; late availability; the 2019 upfitter list names it Zanzibar Metallic; 2019 from GM Authority, 2019 Canyon exterior colors
GM6 Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of GM6 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.