Axle, 5.81 final drive ratio

Years 2025–26 Models 1 Factory citations 2

Also documented for Chevrolet

Documented applications

Terrain — Third generation (2025–2027)

2025–2026 Factory-verified

S: Elevation FWD; not offered: Elevation AWD, AT4, Denali; the 2025 and 2026 guides note front-wheel-drive models only; not in the 2027 guide

GM factory document — 2025 gmc next generation terrain fleet order guide, p.4.
GM factory document — 2026 gmc next generation terrain fleet order guide, p.7.

This page aggregates every documented appearance of F8M in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.