K28 ✓ Factory-verified

GMC · Regular Production Option

Charging module, 11.5 kW

Years 2024, 2026–27 Models 2 Factory citations 4

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Also described as AC charging, 11 kW

Also documented for CadillacChevrolet

Documented applications

Hummer EV Pickup (2022–2027) →

• 2024 ◑ Single-source

  EV2 standard; GM Authority 2024 changes page

Sierra EV — BT1 (2024–2027) →

• 2026–2027 ✓ Factory-verified

  2026: S in 3SB, 3SC, 5SB; □ (included in equipment group, upgradeable) in 4SC, 5SC; not offered in 4SD, 5SD; 2027: S in 3SB, 3SC; □ (included in equipment group, upgradeable) in 4SC, 5SC; not offered in 4SD, 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.12.

  ⛭ 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.11.

Related codes · mentioned in these notes

3SB3SC4SC4SD5SB5SC5SD

This page aggregates every documented appearance of K28 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.