UWN ✓ Factory-verified

Buick · Regular Production Option

Headlamps, enhanced LED functionality

Years 2022–23, 2025–27 Models 2 Factory citations 5

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Also described as Headlamps, enhanced Avenir design

Also documented for Cadillac

Documented applications

Enclave — C1XX (2018–2024) →

• 2022–2023 ✓ Factory-verified

  only in: Avenir; 2022–2023: Avenir: O, included with CWM; GM Authority's 2022 article says the lens design differs while the LED function is the same as T4L

  ⛭ GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.27.

  ⛭ GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.24.

Envision — E2XX (2021–2027) →

• 2025–2027 ✓ Factory-verified

  2027: all trims: 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.

Related codes · mentioned in these notes

CWMT4L

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