A8H ✓ Factory-verified

GMC · Regular Production Option

Package, premium

Years 2026–27 Models 1 Factory citations 4

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Documented applications

Sierra EV — BT1 (2024–2027) →

• 2026–2027 ✓ Factory-verified

  includes CWM, ZM9, CGN and ESG; AS3 requires it; 2026: A in 3SC; not offered in 3SB, 4SC, 4SD, 5SB, 5SC, 5SD; 2027: A in 3SC; not offered in 3SB, 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.16.

  ⛭ 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.15.

Related codes · mentioned in these notes

3SB3SC4SC4SD5SB5SC5SDAS3CGNCWMESGZM9

This page aggregates every documented appearance of A8H in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.