- 2016–2017 Factory-verified
only in: LEA, all-wheel drive; SLE-1, SLE-2, SLT, Denali
FXH Factory-verified
Also documented for BuickChevrolet
Documented applications
This page aggregates every documented appearance of FXH in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.