General Motors says it will begin deliveries of the electric GMC Hummer pickup in December, according to GMC boss Duncan Aldred. And we now know the truck's EPA range number: 329 miles on a charge.

GM had previously predicted the Hummer would achieve a range of 350 miles.

That 329-mile figure applies to the Hummer Edition 1, the top-of-the-line, $100,000-plus iteration that will be the first trucks off the line. The Edition 1 will also tow up to 7,500 pounds and carry up to 1,300 pounds.

Aldred told reporters on a conference call that subsequent, less-pricey models will achieve longer ranges and will be along in 2023.

More than 80% of Hummer reservations are for the Edition 1, though. Aldred said almost half of the 125,000 people who have expressed interest in the Hummer have put down $100 to reserve one. GM has said the first year of Hummer production is sold out.

The Hummer EV joins the Rivian R1T as the first electric pickups to market. Ford's F-150 Lightning rolls out in 2022, and other electrics from Detroit and startups are expected to roll out after that. Tesla is building a $1 billion facility in Austin, Texas, that will, among other things, build the Cybertruck, though timelines on that have come and gone.

The Hummer, by contrast, was developed in just 18 months. It made a big splash last week when President Biden took the wheel during a tour of GM's Factory Zero assembly plant in Hamtramck, Mich. Biden gleefully demonstrated the acceleration of the four-ton, 1,000-horsepower truck, which is said to do 0-to-60 in 3.1 seconds. He then declared, "This sucker's something else."

Next up for GM's EV push will be the Cadillac Lyriq SUV in 2022. The electric Chevy Silverado and GMC Sierra pickups will be revealed Jan. 5. And the SUV version of the Hummer will be introduced in 2023. Aldred expects the SUV to ultimately make up the majority of Hummer sales.

The Edition 1 will also tow up to 7,500 pounds and carry up to 1,300 pounds.

It's official: Two years after GM announced the electric GMC Hummer pickup, the first couple dozen units have left the line at the GM Factory Zero Detroit-Hamtramck Assembly Center, according to GM president Mark Reuss. In an interview with CNBC to celebrate the milestone, Reuss said 17 Hummer EVs are ready for delivery to customers. This makes the Hummer the first of GM's new Ultium-based EVs to leave the factory, and the second electric pickup on the market after the Rivian R1T.

The first 1,200 Hummer EVs made will be Edition 1 models, all of which are Interstellar White outside with Lunar Horizon interiors and bronze badging. Each of the $112,595 pickups is powered by three Ultium motors producing a GM-estimated 1,000 horsepower and 11,500 pound-feet of torque, loaded with features like height-adjusting adaptive suspension, skid rails and rock sliders, 35-inch tires, the diagonal-driving CrabWalk, the launch control system Watts to Freedom that unlocks a three-second sprint to 60 miles per hour, and Super Cruise. Range is a GM-estimated 329 miles when the 200-kWh battery is fully charged.

As these filter out to eager owners, GM is prepping the next four phases of the Hummer rollout. About a year from now, in autumn of 2022, Factory Zero will begin production of the first widely available Hummer, the EV3X pickup that starts at $99,995 before destination. Three Ultium motors will provide an estimated 800 horsepower and 9,500 pound-feet of torque to a range estimated beyond 300 miles. Spring of 2023 is expected to deliver the Hummer EV2X pickup at an MSRP of $89,995, utilizing two motors producing a total 625 hp and 7,400 lb-ft over a range also estimated to go beyond 300 miles. Around the same time, the first units of the $105,595 Hummer SUV Edition 1 are planned to head down lines at Factory Zero. Finally, in the spring of 2024, the entry-level $79,995 Hummer EV2 pickup and its two-motor powertrain should arrive, making the same output as the EV2X, but only good for a range of around 250 miles.

That won't be all we see from Factory Zero, either. GM invested $2.2 billion in the Detroit-Hamtramck plant that once built bread-and-butter GM fare like the Chevrolet Impala, Buick LaCrosse, and Oldsmobile Toronado in order to turn the facility into its first EV base of manufacturing operations for Ultium products. The battery-electric Chevrolet Silverado and GMC Sierra pickups will be built there, as will the Cruise Origin robotaxi.

From the beginning, the Hummer line of vehicles has been synonymous with the phrase, "absolute unit." The M998 Humvee turned to civilian use as the Hummer H1 came with a curb weight of 7,560 pounds depending on configuration. The much more urbane Hummer H2 didn't sacrifice much of those gains, putting about 6,615 on the scales. Let us not forget that the behemoth gravitational pull and square-jawed mass were what every Hummer buyer wanted. So, starting with the brand values and customer demand, and adding the fact that electric vehicles are substantially heavier than their ICE counterparts, no one should be surprised that the 2022 GMC Hummer Edition 1 weighs 9,063 pounds. That's just one of the substantial figures GMC included in a self-certification filing submitted to the U.S. Environmental Protection Agency, the document rooted out by Car and Driver. Last year GMC told us the Hummer would weigh 9,046 pounds, which proves again the Freshman 15 (or 16) is unavoidable.

Loaded up with humans and their accessories, the truck's gross vehicle weight rating (GVWR) comes in at 10,550 pounds.

It takes a few other big numbers to keep that kind of tonnage on the go. The Ultium battery weighs 2,923 pounds. With a 617-amp-hour capacity at 400 volts, total capacity comes in at 246.8 kWh, specific energy at 158 Wh/kg. Usable capacity is about 85% less, at 212.7 kWh. For the time being, these numbers put every other pack in a production vehicle in the shade. That gargantuan chemical plant in the Hummer's floor powers a 329-mile range the same way a giant fuel tanks feed a truck that gets 8 miles to the gallon. The miles per gallon equivalent figures GMC submitted to the EPA are 51 MPGe city, 43 MPGe highway, 47 MPGe combined. Motor Trend questioned whether GM applied the correction factor used for window sticker numbers; if not, the standard 0.7 correction drops the MPGe specs to 36 city, 30 highway, and 33 combined.

However, trucks with a GVWR beyond 8,500 pounds don't need to display fuel economy figures on their window stickers, so don't expect to see any such details on dealer lots. For comparison, the Rivian R1T Launch Edition weighs about 7,000 pounds, and fits a 128.9 kWh battery good for an estimated 314 miles estimated at 70 MPGe. The coming Ford F-150 Lightning weighs about 6,500 pounds, employing its available 1,800-pound Extended Range pack with 131 kWh for an 300 estimated miles.

And for clarity on those five-figure torque figures GMC relished bragging about, the filing also included the Hummer EV's final drive ratios: 13.26:1 at the front axle, 10.49:1 at the rear, with each of the three motors in the Edition 1 good for 265.5 pound-feet of torque. EPA-rated horsepower tallies 983 ponies.

Deliveries of the $110,295 Edition 1 have already begun. This is the sole version for the 2022 model year, the $99,995 2023 Hummer EV3X pickup enters production late this year.