- 2013–2014, 2018–2019 Factory-verified
the 2018–2019 guides name it Winterberry Red Metallic; Dark Argent Metallic lower accent in 2013–2014, Black Carbon Metallic from 2018; 2018–2019: premium paint, not on Encore 1SV; GM Authority's 2021 changes page says Winterberry Red was dropped for 2021
GCS Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of GCS in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.