- 2013–2014, 2018 Factory-verified
the 2018 guide names it Coastal Blue Metallic and marks it premium paint; Dark Argent Metallic lower accent in 2013–2014, Black Carbon Metallic in 2018
GQM Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of GQM in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.