Battery pack, extended range

Years 2024–27 Models 2 Factory citations 8

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Also described as Battery pack, 20 module

Also documented for Chevrolet

Documented applications

Hummer EV Pickup (2022–2027)

2024–2026 Factory-verified

2024: standard on all trims, GM Authority 2024 changes page

GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc hummer ev pickup fleet order guide, p.6.
GM factory document — 2026 gmc hummer ev pickup fleet order guide, p.7.

Sierra EV — BT1 (2024–2027)

2025–2027 Factory-verified

the 2025 guide gives 645 hp and 785 lb-ft; the 2026 and 2027 guides give horsepower and torque by trim; 2025: S in 5SC; not offered in 5SD; 2026: S in 3SC, 4SC, 5SC; not offered in 3SB, 4SD, 5SB, 5SD; 2027: S in 3SC, 4SC, 5SC; not offered in 3SB, 4SD, 5SD

GM factory document — 2025 gmc sierra ev denali fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra ev denali fleet order guide, p.6.
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.

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