LPO, GM NACS Level 2 adapter, residential AC adapter for use on NACS Level 2 chargers

Years 2026 Models 3 Factory citations 4

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Also documented for Cadillac Chevrolet

Documented applications

Hummer EV Pickup (2022–2027)

2026 Factory-verified

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

Hummer EV SUV — BT1 (2024–2027)

2026 Factory-verified

SUV guide wording: LPO, GM NACS Level 2 Adapter, residential AC adapter for NACS Level 2 chargers, including wall and mobile connectors. GM says it is intended for J1772 native inlet vehicles. 2026: O in 3VL, 1SF, 1SG.

GM factory document — 2026 gmc hummer ev suv fleet order guide, p.27.

Sierra EV — BT1 (2024–2027)

2026 Factory-verified

for a J1772 native inlet vehicle

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.24.

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