5H1 ✓ Factory-verified

Buick · Regular Production Option

Key system, 2 keys

Years 2025–27 Models 2 Factory citations 7

Query this via API →

Also documented for ChevroletGMC

Documented applications

Encore GX — VSS-F (2020–2027) →

• 2025–2027 ✓ Factory-verified

  Preferred, Sport Touring, Avenir: S

  ⛭ GM factory document — 2025 buick encore gx fleet order guide, p.3.

  ⛭ GM factory document — 2026 buick encore gx fleet order guide, p.3.

  ⛭ GM factory document — 2027 buick encore gx fleet order guide, p.3.

Envista — VSS-F (2024–2027) →

• 2025–2026 ✓ Factory-verified

  all trims: S

  ⛭ GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 buick envista fleet order guide, p.2.

  ⛭ GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 buick envista fleet order guide, p.2.

This page aggregates every documented appearance of 5H1 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.