- 2022–2023 Single-source
EV3X only; included Infinity Roof (CC3), Extreme Off-Road Package (Z6X), Lunar Horizon interior (H9Z), Interstellar White paint (GAZ) and soft roll-up tonneau cover (VPB); deleted for 2024; GM Authority 2024 changes page
FH1 Single-source
Documented applications
This page aggregates every documented appearance of FH1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.