USK ✓ Factory-verified

Buick · Regular Production Option

Sensor, air quality indicator

Years 2025–27 Models 2 Factory citations 6

Query this via API →

Also documented for Cadillac

Documented applications

Enclave — VSS-S (2025–2027) →

• 2025–2027 ✓ Factory-verified

  S on all trims

  ⛭ GM factory document — 2025 buick all new enclave fleet order guide, p.5.

  ⛭ GM factory document — 2026 buick enclave fleet order guide, p.5.

  ⛭ GM factory document — 2027 buick enclave fleet order guide, p.6.

Envision — E2XX (2021–2027) →

• 2025–2027 ✓ Factory-verified

  2027: Preferred, Sport Touring: O; Avenir: S

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

  ⛭ GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 buick envision fleet order guide, p.5.

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