BAH ✓ Factory-verified

Buick · Regular Production Option

Theft-deterrent system, vehicle immobilizer, PASS-Key III

Years 2012, 2025–26 Models 2 Factory citations 4

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Also described as Theft-deterrent system, immobilizer

Also documented for ChevroletGMCPontiac

Documented applications

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.4.

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

  ⛭ GM factory document — 2026 buick envista fleet order guide, p.4.

Regal — Epsilon II, 5th gen (2011–2017) →

• 2012 ◑ Single-source

  deleted for 2013 (GM Authority 2013 changes); single-source: GM Authority 2013 changes does not credit GM

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