- 2023–2024 Factory-verified
name from GM Authority (2025 changes article, which lists it as deleted for 2025); the upfitter lists read Tripp Met-1 (628G)
GCP Factory-verified
Also documented for CadillacChevrolet
Documented applications
This page aggregates every documented appearance of GCP in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.