TGD ✓ Factory-verified

GMC · Regular Production Option

Headlamps, dual projector, with LED daytime running lamps, charge status indicators, approach and walk-away animation, sequential turn signals

Years 2009, 2026–27 Models 2 Factory citations 5

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Also described as Language control, English, Japanese, German

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

  the TGE list wording is identical; 2026: S in 4SC, 4SD; not offered in 3SB, 3SC, 5SB, 5SC, 5SD; 2027: S in 4SC, 4SD; not offered in 3SB, 3SC, 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.

Related codes · mentioned in these notes

3SB3SC4SC4SD5SB5SC5SDTGE

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