- 2025–2027 Factory-verified
2025: AT4: O; Elevation, Denali: not offered; 2026–2027: AT4, AT4X: O; Elevation, Denali: not offered
Also described as Off-road front bumper packagePackage, off-road
Documented applications
- 2027 Factory-verified
Pro, AT4, AT4X, Denali, Denali Ultimate: not offered; Elevation: included in the trim group; includes off-road suspension, JHD, NZZ, K47 and the X31 hard badge
- 2025–2027 Factory-verified
only in: 2500 HD and 3500 HD pickup; includes hill descent control (JHD), skid plates (NZZ), off-road suspension with twin-tube Rancho shocks and X31 hard badge (the package carries the X31 badge); requires 4WD; Pro, SLE, SLT: O; AT4, AT4X, Denali, Denali Ultimate: not offered
- 2019–2020, 2022–2026 Factory-verified
the upfitter lists read "Appearance package, GMC 'X31 Off Road'"
This page aggregates every documented appearance of X31 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.