GMC is following up the rugged Sierra 1500 AT4X and Canyon AT4X off-road-capable trucks with a heavy-duty announcement. Today, GMC brought forth the first-ever 2024 GMC Sierra HD AT4X and the Sierra HD AT4X AEV Edition.
GMC calls the AEV “a truck that enables adventurers to go further while still having the towing capability essential for heavy-duty haulers.”
“GMC’s AT4X trim, which will be available across the entire GMC truck line-up, offers customers more premium and capable choices when it comes to ‘do-it-all’ capabilities,” said Duncan Aldred, vice president of Global Buick-GMC.
“Each model delivers unique strengths, with the all-new Sierra HD AT4X taking it to the max, enabling you to go virtually anywhere, with the towing power to bring your recreational toys, gear or camper along for the journey.”
Sierra HD AT4X by the numbers
The AT4X trim builds on the foundation of the refreshed 2024 Sierra HD. The new model already includes exterior design updates, new available premium interiors and an all-new tech-focused layout.
On top of that, the Sierra HD AT4X includes an available 18,500-pound max trailering capacity, a factory-installed 1.5-inch suspension lift, Multimatic DSSV dampers, an electronic locking differential, skid plates, and uprated off-road suspension. The HD AT4X will come with 35-inch Goodyear Territory tires.
But lest you think this truck is only a brute, the AT4X trim will also include a unique Obsidian Rush interior featuring premium appointments like heated massage in the full grain leather-wrapped front seats as well as authentic Vanta Ash wood trim and a 12-speaker Bose Premium Series audio system with Centerpoint surround technology.
The centerpiece of the new cabin is an all-new, tablet-style 13.4-inch-diagonal infotainment touchscreen. It is complemented by a 12.3-inch-diagonal configurable driver information center and a 15-inch-diagonal head-up display.
In addition to the standard 6.6-liter gas-fueled V-8 engine, the new AT4X offers the turbocharged pulling power of the available 6.6-liter Duramax Turbo-Diesel V-8. Enhanced for 2024, the new Duramax will deliver 470 horsepower and 975 pound-feet of torque, offering more power across the entire operating speed range. Both engines are paired with an Allison 10-speed automatic transmission and GM’s four-wheel drive system.
The Sierra HD AT4X also includes a new Off-Road driving 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 the pavement. Additionally, Off-Road mode alters throttle progression and transmission shifts to allow for better off-road control and performance.
What is the Extreme AEV Edition?
The available AT4X AEV Edition builds on the AT4X trim with robust stamped steel bumpers with integrated recovery points and front winch capability. 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 such as the AEV logo on the front-seat head restraints and unique AEV-branded floor liners.
“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.”
Pulling its weight
Along with the rest of the 2024 Sierra HD line-up, the new AT4X offers GM’s latest in trailering assistance technologies as well as the available ProGrade Trailering System.
Most heavy-duty truck buyers use their trucks for towing, so the Sierra HD includes a suite of available intelligent assistance technologies designed to help streamline the hitching and towing process. Features include available Transparent Trailer View cameras for Gooseneck and Fifth-Wheel trailers, available Trailer Side Blind Zone Alert and new, available Adaptive Cruise Control with Trailering.
Additionally, there are up to 14 available camera views including Hitch View, Bed View with Zoom and Bed Hitch Guidance, and Rear Side View with Trailer Length Indicator. Some of these require remote cameras installed on the trailer.
The 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.