- 2017, 2019, 2021–2022 Factory-verified
2021 from the upfitter list GM files for 2021 and 2022; shown only in the shared Colorado/Canyon upfitter lists
LHD Factory-verified
Also documented for CadillacChevroletPontiac
Documented applications
- 2023–2024, 2026 Factory-verified
This page aggregates every documented appearance of LHD in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.