TGC ✓ Factory-verified

GMC · Regular Production Option

Headlamps, single projector, with LED daytime running lamps

Years 2009, 2025–27 Models 3 Factory citations 8

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Also described as Language control, French, Spanish, GermanHeadlamps, LED

Also documented for CadillacChevrolet

Documented applications

Envoy — GMT360 (2002–2009) →

• 2009 ✓ Factory-verified
  ⛭ GM factory document — 2009 gmc envoy 2wd rpo code list, p.1.

Sierra EV — BT1 (2024–2027) →

• 2026–2027 ✓ Factory-verified

  2026: S in 3SB, 3SC; not offered in 4SC, 4SD, 5SB, 5SC, 5SD; 2027: S in 3SB, 3SC; not offered in 4SC, 4SD, 5SC, 5SD

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

  ⛭ GM factory document — 2026 gmc sierra ev fleet order guide, p.9.

  ⛭ 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.8.

Terrain — Third generation (2025–2027) →

• 2025–2027 ✓ Factory-verified

  S: Elevation; not offered: AT4, Denali

  ⛭ GM factory document — 2025 gmc next generation terrain fleet order guide, p.4.

  ⛭ GM factory document — 2026 gmc next generation terrain fleet order guide, p.7.

  ⛭ GM factory document — 2027 gmc terrain fleet order guide, p.7.

Related codes · mentioned in these notes

3SB3SC4SC4SD5SB5SC5SD

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