- 2017–2018 Factory-verified
2018 guide: SLE-1, SLE-2, SLT-1, SLT-2, Denali: O; adds to the standard 6-month Guidance Plan trial; requires UE1
PQF Factory-verified
Also documented for BuickCadillacChevrolet
Documented applications
This page aggregates every documented appearance of PQF in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.