GMC Takes Heavy Duty Further Off-Road 

Introducing the First-Ever Sierra HD AT4X and Extreme AEV Edition

Enhanced off-road capability matched with available 18,500-pound max trailering1

Offers the most trailering tech in its class2 and first-class luxury features

Specialized AEV Edition offers extreme capability and confidence off-road

GMC first elevated key off-road truck segments with the premium and capable Sierra 1500 AT4X and Canyon AT4X. Today, GMC announced the next step with the first-ever 2024 GMC Sierra HD AT4X — featuring the Sierra HD AT4X AEV Edition — a truck that enables adventurers to go further while still having the towing capability essential for heavy duty haulers.The Sierra HD AT4X bolsters GMC’s lineup of premium off-road trucks, balancing increased off-road capability, smooth on-road handling, offering the most trailering technology in its class2 and first-class luxury and comfort features.“GMC’s AT4X trim, which will be available across the entire GMC truck lineup, offers customers more premium choices when it comes to ‘do-it-all’ capabilities,” said Duncan Aldred, global vice president, Buick-GMC. “Each model delivers unique strengths, with the all-new Sierra HD AT4X taking it to the max, giving our customers the most luxurious and most off-road capable HD we’ve ever offered. AT4X means you can conquer almost any terrain, in complete comfort and with the towing power to bring your recreational toys, gear or camper along for the adventure.”AT4X: Premium off-roading the GMC wayBuilding on the foundation of the revamped 2024 Sierra HD, which receives fresh design updates, new available premium interiors and an all-new tech-focused layout, the new Sierra HD AT4X’s highlights include:

Available 18,500-pound max trailering capacity1

Factory-installed 1.5-inch (38mm) suspension lift

Multimatic DSSV dampers

Rear e-locking differential

35-inch Goodyear Territory tires

Specific front upper and lower control arms and specific steering knuckles

Larger steel transfer case skid plate and front aluminum skid plate

Unique Obsidian Rush interior featuring premium appointments like massaging, full-grain leather-wrapped front seats

The Sierra HD AT4X also includes a new Off-Road Mode. When engaged, the Off-Road Mode adjusts various vehicle calibrations, such as the anti-lock brakes, traction control and stability control, to provide optimized performance when venturing off-road. Additionally, Off-Road Mode alters throttle progression and transmission shifts to allow for better off-road control and performance.Extreme AEV EditionThe available AT4X AEV Edition adds robust stamped steel bumpers with integrated recovery points and front winch capability which provide additional driver confidence and protection. It also features heavy duty steel skid plates that help keep vital components such as the steering gear and transfer case protected on the trail. Additional features include unique 18-inch Salta wheels and unique exterior badging and interior cues.“The Sierra HD is an ideal foundation when it comes to on-road performance, off-road capability and insane pulling power,” said AEV CEO and founder Dave Harriton. “As with the Sierra 1500 before it, we took AEV’s signature performance-driven approach and dedication to detail to elevate the aspects that off-road customers want and demand in their heavy-duty truck. The result is an awesome truck with capability and confidence in all the right spots.”Coming in Q3 2023The 2024 GMC Sierra HD AT4X and AT4X AEV Edition are expected to arrive at dealerships in the fall of 2023. Pricing will be announced closer to the start of production.

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