EPA Filings Reveal GMC Hummer Edition One's Weight, Efficiency, and Range Figures

With the loaded-up Edition One version of the 2022 GMC Hummer EV—the only version you can buy now-ish—coming out soon, we've been curious what its real world weight and power capacity would be. Sure, we tested one of the new Hummers last year, and we knew it'd be heavy, but it's always interesting to see what the figures will be reported to the EPA as. Now, we finally have those numbers and more, and the big electric Hummer isdefinitelyheavy—as is its humongous battery pack. And we can finally peek into the rig's efficiency, too.

The Weight Of The Hummer Name, Literally

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As noted byCar and Driver, the filing is for the fully loaded 2022 GMC Hummer Edition One and when we say "fully loaded" we definitely mean it. Rolling on to the scales, GMC's first ever EV weighs a staggering 9,063 pounds and earns its heavy-duty vehicle rating. GM also lists its GVWR at 10,550 lbs. It's nearly 950 pounds heavier than the original Hummer H1's curb weight (when it was fully loaded). Most of the new pickup's weight comes from the batteries, obviously, as they're noted in the filing as weighing an incredible 2,923 pounds. The pack has a specific energy of 158 Wh/kg, meaning its capacity is...

Real World Battery Capacity and Range

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Using the EPA filing's listed 617 amp hours (Ah) capacity and voltage (400 volts), however, we arrive at a total (gross) battery capacity of 246.8 kWh, though the realistic usable capacity scenario is about 85 percent of the total capacity, or just over the 200 kWh General Motors has said the Hummer would get.

What does that equate to in MPGe? In the filing, there are references to a 51 MPGe in the city, and 43 MPGe on the highway; using the EPA's weighted averages for calculating combined fuel economy (55 percent city, 45 percent highway), we arrive at 47 MPGe combined. Those figures lack the correction factor applied to generate the window-sticker figures customers will see and that we use to compare figures between manufacturers. While we're not sure whether GM has provided its own factor, which manufacturers can do with supporting data, applying the standard 0.7 correction numbers (GM didn't use the full five-cycle test, otherwise its factor would be 0.72), gives us 36 MPGe city, 30 MPGe highway, and 33 MPGe combined. Those are...not great figures as far as EVs go, but whether customers ever see them is a different story. Because the Hummer EV is so heavy, it is exempt from requirements that those MPGe figures be included on the window sticker. A GMC spokesperson toldCar and Driverthat the automaker doesn't plan on including them.

More intriguingly, the EPA filing includes raw range figures of 502 miles in the city and 430 miles on the highway, from which we can extrapolate a 470-mile range. Again, this appears to be an uncorrected figure, so applying the EPA's standard 0.7 factor to it, we arrive at a more realistic 329 mile combined range. We'll wait for the final window sticker figures to be published to be sure, but also keep in mind that lighter, less powerful, non-Edition-One versions of the Hummer are sure to be more efficient and therefore capable of better range.

The Power Is Good, Though!

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Despite—or perhaps because of—that 4.5 tons of weight, the Hummer EV is plenty powerful. While the 6.6-liter diesel V-8 of the H1 produced only 300 hp and the 6.2-liter V-8 of the H2 made only 393 hp, the new Hummer EV is rated at 983 hp according to the EPA. The report didn't give us an official torque rating for the vehicle at its wheels—though we figured that out already, and it's not 11,500 as GMC boasts—but it confirms the final drive ratios we've been working with for each axle (13.26:1 front, 10.49:1 rear), and it lists specs for a single motor's torque output (265.5 lb-ft); remember the Edition One has three motors, and it isn't clear how much power the one up front receives versus the two driving the rear axle. In any event, even with its 9,000-plus-pound weight, the three-motor Hummer EV is quick. GMC claims the Hummer EV reaches 60 mph in only 3.0 seconds in Watts to Freedom (WTF) mode and when we drove a prototype the experience blew us away.

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