- 2025–2026 Factory-verified
touch-up paint WA-253K; new for 2025; extra cost, not available on Preferred or Avenir; the 2026 guide marks it not available to order
GKN Factory-verified
Also described as Aquamarine Blue Metallic
Also documented for Chevrolet
Documented applications
- 2025–2026 Factory-verified
extra cost; Sport Touring only; the 2026 guide says it is not available to order
This page aggregates every documented appearance of GKN in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.