C91 ✓ Factory-verified

Buick · Regular Production Option

Lighting, interior, overhead courtesy lamp

Years 2025–26 Models 1 Factory citations 4

Query this via API →

Also documented for ChevroletGMCSaturn

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.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 C91 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.