Axle, 3.17 final drive ratio

Years 2016–19, 2025–27 Models 2 Factory citations 7

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Also documented for Chevrolet GMC

Documented applications

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

only in: AWD; Preferred, Sport Touring, Avenir: S; also named by GM Authority

GM factory document — 2025 buick encore gx fleet order guide, p.7.
GM factory document — 2026 buick encore gx fleet order guide, p.7.
GM factory document — 2027 buick encore gx fleet order guide, p.7.

Envision — D2XX, imported from China (2016–2020)

2016–2019 Factory-verified

1SN, 1SP: S (the LTG models); GM Authority's 2020 page gives the 3.17 ratio without the code

GM factory document — 2016 buick envision order guide copy gm authority, p.4, p.16.
GM factory document — 2017 buick envision order guide copy gm authority, p.5, p.20.
GM factory document — 2018 buick envision order guide copy gm authority, p.5, p.19.
GM factory document — 2019 buick envision order guide copy gm authority, p.6, p.22.

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