Axle, 3.47 final drive ratio

Years 2017–18, 2025–27 Models 3 Factory citations 9

Query this via API →

Also documented for Buick Cadillac GMC

Documented applications

Blazer — C1XX (2019–2026)

2025–2026 Factory-verified

2LT, 3LT: S; RS: 2025: not available; 2026: S; Premier: S (2025 only); with the LSY engine

GM factory document — 2025 chevrolet blazer fleet order guide rpo codes, p.1.
GM factory document — 2025 chevrolet blazer fleet order guide, p.8.
GM factory document — 2026 chevrolet blazer fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet blazer fleet order guide, p.6.

Equinox — Fourth generation (2025–2027)

2025–2027 Factory-verified

2025, 2026: S: 2LT, KDZ, 2RS; not offered: 1LT, XDB, 1RS; 2027: S on all trims; the 2025 and 2026 guides note all-wheel-drive models only; the 2027 guide marks it standard in all six columns without that note

GM factory document — 2025 chevrolet all new equinox fleet order guide, p.6.
GM factory document — 2026 chevrolet equinox fleet order guide, p.6.
GM factory document — 2027 chevrolet equinox fleet order guide, p.6.

Sonic — first generation (2012–2020)

2017–2018 Factory-verified

LS, LT automatic: S; with the MH9 automatic

GM factory document — 2017 chevrolet sonic order guide copy gm authority, p.62.
GM factory document — 2018 chevrolet sonic order guide copy gm authority, p.68.

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