M3F ✓ Factory-verified

Buick · Regular Production Option

Transmission, 9 speed automatic, 9T4X, Gen 1

Years 2025–27 Models 1 Factory citations 3

Query this via API →

Also documented for Chevrolet

Documented applications

Encore GX — VSS-F (2020–2027) →

• 2025–2027 ✓ Factory-verified

  only in: AWD; Preferred, Sport Touring, Avenir: S

  ⛭ GM factory document — 2025 buick encore gx fleet order guide, p.8.

  ⛭ GM factory document — 2026 buick encore gx fleet order guide, p.8.

  ⛭ GM factory document — 2027 buick encore gx fleet order guide, p.8.

This page aggregates every documented appearance of M3F in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.