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It also includes the new opulent Denali Ultimate trim. We’ve been aware that GMC would launch the all-new Sierra HD within days of Chevy being in the spotlight, and now it’s here.

GMC focuses on luxury with the new Sierra Heavy Duty Denali Ultimate trim, while Chevy goes off-road. Later in the model year, the Sierra HD AT4X trim, which is optimized for off-road driving, will be offered. Unfortunately, GMC is as secretive as Chevrolet and has not released any additional information.


Duncan Aldred, vice president of Global Buick and GMC, said, “The new and improved 2024 Sierra HD builds on an already winning foundation.” With the introduction of the Denali Ultimate trim and the truly off-road AT4X trim, this truck elevates the HD segment and further cements the dominance of GMC’s truck portfolio.” 6.6-liter Duramax V8 turbocharged diesel engine now available as an option trim is mated to an Allison 10-speed transmission, an upgrade that will interest most heavy-duty customers. From 445 horsepower and 910 lb-ft, the engine now produces 470 horsepower and 975 lb-ft of torque, an increase from 445 horsepower. and 910 lb-ft. GMC claims the new engine has 25% more low-end grunt.


As a result, towing capacities have increased. In the 2500HD Crew Cab (Long Bed 2WD) configuration, the GMC Sierra HD can tow up to 21,900 pounds, while in the 2500HD it can tow up to 22,500 pounds. That’s an increase of £4,000 over the current model. When equipped with a gooseneck hitch and a V8 diesel engine, the 3500HD can tow up to 36,000 pounds.
The 6.6-liter naturally aspirated gas engine will continue to be standard on the 2024 Sierra HD lineup, which includes the 2500HD and 3500HD in Regular Cab, Extended Cab and Crew Cab configurations. Two-wheel models are available on the 3500HD. Plus, it’s mated to a brand new 10-speed transmission that should make trailering more enjoyable. The vehicle’s fuel consumption will increase due to the increased range of gear ratios. It still makes 401 horsepower and 464 pound-feet of torque.


Similar to Ford’s new F-Series Super Duty, GMC is also introducing a number of trailer assist technologies. Technology options here include transparent trailer display, trailer side blind spot warning, trailer adaptive cruise control and GCW warning. If the vehicle and trailer weigh more than the combined total weight of the vehicle, the trailer informs the driver.
In addition, the truck can be equipped with up to 14 cameras that show a view down the side of the truck including the length of the trailer, a view of the loading area and guidance for the coupling process. Forward Collision Warning, Lane Departure Warning, Automatic Emergency Braking, Front Pedestrian Braking (new for 2024), IntelliBeam Automatic High Beams and Distance Monitoring Indicator are standard safety features across the range.

An available 13.4-inch touchscreen interface, 15-inch head-up display and 12.3-inch digital instrument cluster add visual interest to the interior. The huge infotainment screen is customizable and can display media and navigation on opposite sides. Built-in Apple CarPlay and Google’s Android Auto are standard features.
The front bumper, grille, grille designs and finishes on each trim are revised as part of the exterior enhancements. There are six new exterior colors and a new wheel design. Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat Metallic, Redwood Metallic, Meteorite Metallic and Downpour Metallic are all-new options. The Denali Ultimate is said to be the most sophisticated and luxurious pickup in its class. It features a model-specific grille, 20-inch ultra-bright machined aluminum wheels with high-gloss black accents, and a distinctive fender logo depicting the topography of Mount Denali as standard equipment. In addition, the six-way Multipro tailgate with Kicker sound system is standard.

Inside, it has open-pore Paldao wood, full leather upholstery, etched stainless steel speaker grilles, 16-way power adjustment, massaging front seats, microsuede headliner, power sunroof, and a Bose sound system. with 12 speakers.

The updated 2024 GMC Sierra HD will be available at dealers in the first quarter of 2023, and the AT4X will be available later that year. Pricing will be announced shortly before production begins.

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