Vehicle
GMC Hummer EV
A GMC, not a Hummer — the marque was not revived, the name was applied to a GMC model — and mechanically it has nothing whatever in common with the H1, H2 or H3. It is an Ultium BT1 vehicle with a roughly 213 kWh usable pack, two or three motors, four-wheel steering that can crab the vehicle diagonally, and an adaptive air suspension with a large lift range. It weighs about 4,500 kg, which changes lifting, jacking, towing and brake work more than any electrical consideration does. The pack architecture switches between 400 and 800 volts for charging, so establish which before testing isolation.
Generations
-
BT1 2021–present
Pickup from 2021, SUV from 2023. Edition 1 and EV3X are triple-motor; EV2 and EV2X are dual-motor with substantially less power.
- Body styles
- Pickup · SUV
- Platform
- GM BT1 (Ultium)
- Engines
-
- 213 kWh dual motor — electric · 466 kW (625 hp) · EV2 and EV2X
- 213 kWh triple motor — electric · 746 kW (1000 hp) · Edition 1 and EV3X
- 170 kWh electric — electric · 20 module: c. 170 kWh Li-ion
- Transmissions
- Single-speed reduction gear
- Drivetrain
- All-wheel drive
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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