- 2023, 2025–2027 Factory-verified
O: Cargo 1WT, Cutaway 1WT, Cutaway 2WT (2025–2026), Passenger 1LS, Passenger 1LT
PSR Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of PSR in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.