- 2025–2026 Factory-verified
AT4: O; Elevation, Denali: not offered; the 2026 and 2027 lists carry the same name under PDI
XNF Factory-verified
Also described as Nightfall EditionTire, front: P235/75R16 106S, all-season, blackwall
Also documented for CadillacChevrolet
Documented applications
- 2003, 2006 Factory-verified
- 1999–2004 Factory-verified
- 2000–2002 Factory-verified
This page aggregates every documented appearance of XNF in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.