Weighing a reported 8,660 pounds, the Hummer EV SUV is a heavy beast. Due to its bulk, we didn’t park it on a paver driveway for fear it would create depressions under each of its four massive wheels. You constantly feel the heft when driving, too, as the adaptive air suspension works overtime to manage the wallow, lean, and rubbery ride quality. A teenager riding in the back seat even commented on it, sharing that she didn’t like the sensation.
Unsurprisingly, you need lots of power to move this amount of mass. The test vehicle’s three-motor powertrain takes care of that, supplying up to 860 horsepower and a truly astounding 11,500 pound-feet of torque when using the Watts to Freedom launch control. With that engaged, GMC claims its electric SUV can accelerate to 60 mph in an incomprehensible 3.5 seconds.
We didn’t use Watts to Freedom because even without it, the Hummer is squirrelly under a heavy right foot. Stomp on the accelerator from a stop, and the front end lifts high enough to block part of the view ahead while the electric motors figure out how to make the balloon-sized 35-inch tires spin as fast as possible without relinquishing their grip on the road. It feels like a situation that could get sketchy without much notice, especially on any surface but dry pavement.
Our test vehicle had the Extreme Off-Road Package, which, for about ten grand, adds the equipment you need for extreme off-roading. You get 35-inch mud-terrain tires (on 18-inch wheels), locking front and rear differentials, full underbody skid plates, underbody cameras, rocker panel protection with assist steps, a rear recovery hook, and exclusive wheel designs.
In the interest of full disclosure, our release form to test-drive the Hummer EV SUV prohibited off-roading without written permission from General Motors. We could have asked, but testing week fell during a triple-digit Southern California heat wave, and despite the standard Extract Mode technology, putting this EV’s capabilities to the test in a remote area simply would not be safe or smart.
So, we took it to the beach instead, where its four-wheel steering made quick work of tucking the Hummer into a free parallel space fronting Westward Beach in Malibu. Alternatively, we could have used the Enhanced Automatic Parking Assist, but it never would have identified as viable the space we found and squeezed into.
Unfortunately, after parking, we realized the tailgate design would make unloading impossible, so we nixed that plan and put the Hummer in the pay lot further down near Point Dume, where the rear-wheel steering worked equally well slipping into a perpendicular spot. Our test vehicle had numerous exterior cameras to assist with parking, and you’ll need them because the Hummer EV SUV is both wide and hard to see out of.
We also used the Hummer as a daily driver and took it on our usual SoCal test-driving loop. In all situations, the four-wheel steering is helpful, whether making U-turns on city streets or driving down a twisty mountain road. Crabwalk is less convincing, and it’s hard to conceive of a use case where it might be superior to the rear-steering system as far as maneuverability goes. Therefore, it strikes us as a flex and not a helpful feature.
The mud-terrain tires whir loudly at all times. Take the Hummer EV SUV on a freeway, and wind noise is a constant companion. The teenager who commented on the sensation of weight also chimed in about the road noise, claiming it reminded her of the sounds inside The Matterhorn ride at Disneyland.
Drive anywhere with the lane-keep assist system on, and you’ll find the heavy SUV behaving in ways you don’t expect due to the automated steering inputs. We found it much better to drive without that system active. We were also constantly aware of the Hummer EV SUV’s weight, width, and your personal responsibility for it. In a collision, this vehicle will demolish most other cars on the road, so you must take extra care to avoid one, whether it is your fault or the other driver’s.
GMC delivered the Hummer with 306 miles of indicated range and a nearly full battery. So, the maximum driving range is competitive. Also, the Hummer EV SUV is compatible with 300-kilowatt DC fast charging stations, and GMC claims you can get 100 miles of extra range in as few as 14 minutes if you can find one of those stations.
Opening our EVGo charging station app, we discovered some previously unknown 350-kW chargers in the next city over. The app indicated they were open, so we programmed the Hummer’s navigation system to take us there. When you do that, the Hummer EV automatically preconditions its battery pack to accept the maximum charging rate when you arrive.
By the time we got to the chargers, both of the 350-kW units were in use. More were available a couple of miles away, so we drove to the second EVGo location, plugged in, and soon, the Hummer was charging at 145 kW (apparently, the maximum available at that time). Our charging session went sideways shortly thereafter. Fourteen minutes in, a message popped up on the Hummer’s dashboard display: “DC Fast Charging Rate Limited. Your charge may take more time than expected to complete.” That’s when the charge rate dropped to 45 kW.
Then, after a total of 33 minutes on the charger, we got this message: “Charging Interrupted or Overridden. This may be due to an app stopping the charge or problems with the charge station /cord. Try reconnecting the charge cord.” By now, it had been well over an hour since we’d left home. From the time we plugged in, the Hummer’s battery charge had risen from 37% to 58%, adding 50 miles of indicated range at a cost of $25.10 including the session fee.
Our frustrating experience, a common one across test vehicles, is why many people are skeptical about electric vehicles. Despite Tesla showing everyone how it should be done with its Supercharger network, the public charging experience remains awful for EVs from other brands. So, if you get an EV, upgrade your home with a home charging station to avoid using public chargers.
And just as internal-combustion Hummers got terrible fuel economy, the electric Hummer isn’t efficient at all, consuming an EPA-estimated 67 kilowatt-hours of electricity for every 100 miles of driving. For comparison, the least efficient version of the three-row Kia EV9 rates 42 kWh/100 miles. On a hot testing day, we departed on our mountainous evaluation loop with 169 miles of range, drove 68.4 miles, and returned with 85 miles of remaining range. The Hummer consumed electricity at an indicated rate of 1.4 miles per kWh, or 71.4 kWh/100 miles, proving even less efficient than the EPA estimate.