T4L ✓ Factory-verified

GMC · Regular Production Option

Headlamps, LED, with LED daytime running lamps

Years 2019, 2022–27 Models 8 Factory citations 26

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Also described as Headlamps, LEDHeadlamps, animated LED projectors, LED turn signals and daytime running lampsHeadlamps, LED, C-shaped lighting

Also documented for BuickCadillacChevrolet

Documented applications

Canyon — Third generation (VSS-T) (2023–2027) →

• 2023–2027 ✓ Factory-verified

  S on all trims

  ⛭ GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.12.

  ⛭ GM factory document — 2024 gmc canyon fleet order guide wayback, p.1.

  ⛭ GM factory document — 2025 gmc canyon fleet order guide, p.4.

  ⛭ GM factory document — 2026 gmc canyon fleet order guide, p.6.

  ⛭ GM factory document — 2027 gmc canyon fleet order guide, p.6.

Hummer EV Pickup (2022–2027) →

• 2025–2026 ✓ Factory-verified
  ⛭ GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 gmc hummer ev pickup fleet order guide, p.4.

  ⛭ GM factory document — 2026 gmc hummer ev pickup fleet order guide, p.5.

Hummer EV SUV — BT1 (2024–2027) →

• 2025–2026 ✓ Factory-verified
  ⛭ GM factory document — 2025 gmc hummer ev suv fleet order guide, p.4.

  ⛭ GM factory document — 2026 gmc hummer ev suv fleet order guide, p.5.

Sierra EV — BT1 (2024–2027) →

• 2025–2027 ✓ Factory-verified

  the 2025 guide adds charge indicators

  ⛭ GM factory document — 2025 gmc sierra ev denali fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 gmc sierra ev denali fleet order guide, p.5.

  ⛭ GM factory document — 2027 gmc sierra ev fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 gmc sierra ev fleet order guide, p.9.

Sierra HD — T1XX (2020–2027) →

• 2024–2027 ✓ Factory-verified

  2024: GM Authority 2024 changes page (animated LED headlamps, standard on all trims); Pro, SLE, SLT, AT4, AT4X, Denali, Denali Ultimate: S

  ⛭ GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.6.

  ⛭ GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.6.

  ⛭ GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.5.

Terrain — Second generation (D2XX) (2018–2024) →

• 2019 ✓ Factory-verified

  Denali: S

  ⛭ GM factory document — 2019 gmc terrain order guide copy gm authority, p.7, p.38.

Yukon — T1XX (2021–2027) →

• 2022–2023 ✓ Factory-verified
  ⛭ GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.12.

  ⛭ GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.12.

Yukon XL — T1XX (2021–2027) →

• 2022–2023 ✓ Factory-verified
  ⛭ GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.12.

  ⛭ GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.12.

This page aggregates every documented appearance of T4L in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.