FHS ✓ Factory-verified

Buick · Regular Production Option

E85 FlexFuel capable (unleaded or up to 85% ethanol)

Years 2025–27 Models 1 Factory citations 3

Query this via API →

Also documented for ChevroletGMC

Documented applications

Encore GX — VSS-F (2020–2027) →

• 2025–2027 ✓ Factory-verified

  only in: FWD; Preferred: 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.

Related codes · mentioned in these notes

FWD

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