
Click for more information.
GMC today announced 2024 GMC Sierra HD AT4X , emphasizing the premium Sierra HD AT4X AEV Edition*. AT4X includes a new Off-Road Mode. When engaged, the Off-Road Mode adjusts vehicle calibrations, such as the anti-lock brakes, traction control and stability control, to provide what’s claimed to be optimized performance off-road. Additionally, Off-Road Mode alters throttle progression and transmission shifts to allow for better off-road control and performance. Say it ain’t so? GMC will continue to make the 6.6-liter Diesel engine available.
“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,” Aldred effused.

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Built off the 2024 Sierra HD, which receives optional premium interiors and a claimed tech-focused layout, the new Sierra HD AT4X has:
- Optional 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
- Dedicated front upper and lower control arms and steering knuckles
- Larger steel transfer case skid plate and front aluminum skid plate
- Unique (marketing babble alert> Obsidian Rush interior with massaging and full-grain leather-wrapped front seats
Heavy Duty Turbocharged Power
The standard 6.6-liter gas engine is joined by the optional, 6.6-liter Duramax Turbo-Diesel. for 2024, it is rated at 470 horsepower and 975 lb.-ft. of torque. Both engines are paired with an Allison 10-speed automatic transmission.
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.
AutoInformed on
Inevitable 2024 Sierra HD Footnotes
- 1Sierra HD AT4X’s 18,500-lb max rating requires the optional 6.6-liter Diesel engine and conventional towing. Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.
- 2Class is gasoline and diesel heavy duty pickups in the GM Large Pickup segment. Based on latest competitive data available.
- 3GMC Infotainment System functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.
- 4Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Read the vehicle Owner’s Manual for important feature limitations and information. Requires available accessory camera and installation. Not compatible with all trailers. See your dealer for details.
- 5Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Read the vehicle’s owner’s manual for important feature limitations and information.
- 6Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Read the vehicle Owner’s Manual for important feature limitations and information. Some camera views require available accessory camera and installation. Not compatible with all trailers. See your dealer for details.
*Extreme AEV Edition
The stratospheric-level-priced AT4X AEV Edition adds stamped steel bumpers with integrated recovery points and front winch It also has heavy-duty steel skid plates that help keep vital components such as the steering gear and transfer case protected. Additional items 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.”
About Ken Zino
Ken Zino, editor and publisher of AutoInformed, is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn.
He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe.
Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped during a downshift and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap.
AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks.
Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.
First Look – 2024 GMC Sierra HD AT4X, and AEV
Click for more information.
GMC today announced 2024 GMC Sierra HD AT4X , emphasizing the premium Sierra HD AT4X AEV Edition*. AT4X includes a new Off-Road Mode. When engaged, the Off-Road Mode adjusts vehicle calibrations, such as the anti-lock brakes, traction control and stability control, to provide what’s claimed to be optimized performance off-road. Additionally, Off-Road Mode alters throttle progression and transmission shifts to allow for better off-road control and performance. Say it ain’t so? GMC will continue to make the 6.6-liter Diesel engine available.
“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,” Aldred effused.
Click for more information.
Built off the 2024 Sierra HD, which receives optional premium interiors and a claimed tech-focused layout, the new Sierra HD AT4X has:
Heavy Duty Turbocharged Power
The standard 6.6-liter gas engine is joined by the optional, 6.6-liter Duramax Turbo-Diesel. for 2024, it is rated at 470 horsepower and 975 lb.-ft. of torque. Both engines are paired with an Allison 10-speed automatic transmission.
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.
AutoInformed on
Inevitable 2024 Sierra HD Footnotes
*Extreme AEV Edition
The stratospheric-level-priced AT4X AEV Edition adds stamped steel bumpers with integrated recovery points and front winch It also has heavy-duty steel skid plates that help keep vital components such as the steering gear and transfer case protected. Additional items 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.”
About Ken Zino
Ken Zino, editor and publisher of AutoInformed, is a versatile auto industry participant with global experience spanning decades in print and broadcast journalism, as well as social media. He has automobile testing, marketing, public relations and communications experience. He is past president of The International Motor Press Assn, the Detroit Press Club, founding member and first President of the Automotive Press Assn. He is a member of APA, IMPA and the Midwest Automotive Press Assn. He also brings an historical perspective while citing their contemporary relevance of the work of legendary auto writers such as Ken Purdy, Jim Dunne or Jerry Flint, or writers such as Red Smith, Mark Twain, Thomas Jefferson – all to bring perspective to a chaotic automotive universe. Above all, decades after he first drove a car, Zino still revels in the sound of the exhaust as the throttle is blipped during a downshift and the driver’s rush that occurs when the entry, apex and exit points of a turn are smoothly and swiftly crossed. It’s the beginning of a perfect lap. AutoInformed has an editorial philosophy that loves transportation machines of all kinds while promoting critical thinking about the future use of cars and trucks. Zino builds AutoInformed from his background in automotive journalism starting at Hearst Publishing in New York City on Motor and MotorTech Magazines and car testing where he reviewed hundreds of vehicles in his decade-long stint as the Detroit Bureau Chief of Road & Track magazine. Zino has also worked in Europe, and Asia – now the largest automotive market in the world with China at its center.