- 2021–2022 Factory-verified
touch-up WA-661G; new for 2021, not on WT, LT or Z71 (GM Authority 2021 Colorado colors, which read Sand Dune); 2021 from the upfitter list GM files for 2021 and 2022
GTL Factory-verified
Also described as Sand Dune Metallic
Also documented for GMC
Documented applications
- 2023–2024 Factory-verified
name as the 2023 and 2024 upfitter lists print it (Sand Dune Met-1); GMC sold this paint as Desert Sand Metallic (Canyon doc)
This page aggregates every documented appearance of GTL in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.