GM on Friday released range estimations for its 2023 GMC Hummer EV Pickup and 2024 GMC Hummer EV SUV, including the loaded 3X trim for both body styles. 

The company is now suggesting that one of the models of its so-called supertruck might go 355 miles on a charge; and if anything it’s a testament to how much impact tires can have on EV range. 

With the 3X model’s 22-inch wheels and 35-inch All-Terrain tires, it steps into a role that’s a little more road-oriented—and it may be the better pick for those who seldom if ever plan to take advantage of this model’s off-road prowess. That helps achieve what GM is estimating at 355 miles on a charge of its 213-kwh battery pack. 

2022 GMC Hummer EV Edition 1

Meanwhile, when fitted with the Extreme Off-Road Package—bringing back the Edition 1’s 18-inch wheels with 35-inch Mud-Terrain tires, both models retain GM’s 329-mile estimate for the Edition 1. 

GM notes that it’s continuing the launch edition version of the Hummer EV Pickup (formerly termed SUT), while the 3X will allow more customization. 

The SUV, with its somewhat smaller 170-kwh battery pack, achieves 314 miles in its Edition 1 launch edition, or in 3X SUV form, both with standard 22-inch wheels. Both models are instead estimated at 298 miles with the Extreme Off-Road Package, riding on 18-inch wheels with 35-inch Mud-Terrain tires. 

2022 GMC Hummer EV Edition 1

As GMC has underscored in the past, it’s a little tricky. With a curb weight of more than 9,000 pounds, it’s disqualified as a passenger vehicle or light truck, and thus the EPA test doesn’t apply on any official basis. It wasn’t conceived for vehicles of this weight—or for big HD pickups, for instance. 

As GM has also emphasized, the Hummer EV isn’t a light-duty truck in its Edition 1 or 3X guise but will be one in subsequent guises that might now be pushed back to the 2025 model year on. As officials confirmed previously, it’s submitted EPA test paperwork to California’s Air Resource Board (CARB) with that in mind.

With such a large, double-decker battery pack that can be connected in tandem for 800-volt fast-charging, the capacity itself also gets a little tricky. GMC has also clarified to Green Car Reports that, based on IEC standards, the Hummer EV Pickup’s largest battery pack rates at 205 kwh based on IEC standards or 213 kwh based on ISO standards. For the EV SUV it’s only given a capacity of 170 kwh based on the lower IEC standard. 

2024 GMC Hummer EV SUV V2V charger

The EV Pickup with that larger pack can gain 100 miles of range in just 10 minutes on a 350-kw CCS DC fast-charging connector, or the EV SUV can gain 100 miles in 14 minutes. Both versions of the 2024 GMC Hummer EV gain vehicle-to-load power generation through GMC’s Power Station generator—allowing it to charge other EVs at 6 kw, or provide up to 25 amps of output at either 120 volts or 240 volts.