- 2025–2026 Factory-verified
S: Elevation FWD; not offered: Elevation AWD, AT4, Denali; not in the 2027 guide
CNI Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of CNI in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.