- 2023 Single-source
SLE, SLT, Denali; not on AT4; dropped for 2024 (GM Authority 2024 paint-loss article; GM Authority 2024 changes page)
GHT Single-source
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of GHT in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.