(October 11, 2022) DETROIT — Led by the first-ever Sierra Heavy Duty Denali Ultimate, the 2024 model year takes the Sierra HD lineup to new heights with premium luxury and comfort, turbocharged pulling power and elevated technology — offering the most trailering assistance technology in its class. In addition to the debut of the Denali Ultimate trim, the 2024 Sierra HD will build upon GMC’s premium off-road offerings, introducing the off-road optimized Sierra HD AT4X trim later in the model year.

“The new and enhanced 2024 Sierra HD builds on an already winning foundation,” said Duncan Aldred, vice president of Global Buick and GMC. “This truck elevates the HD segment with the introductions of the Denali Ultimate trim and will soon add the seriously off-road capable AT4X trim, further strengthening the dominance of the GMC truck portfolio.”

Heavy Duty highlights:

        Enhanced power with the combination of the available 6.6L Duramax Turbo-Diesel V-8 and 10-speed Allison transmission delivering 470 horsepower and 975 lb-ft of torque and providing 25% more low-end torque vs. the current model for a greater feeling of power on demand
       
        Max towing across the lineup, including:
       
        Up to 21,900 pounds on 2500HD Crew Cab – best in class
        Up to 22,500 pounds on 2500HD – a 4,000-pound increase over the current model
        Up to 36,000 pounds on 3500HD
       
        Most available trailering assistance technologies in its class through GMC’s ProGrade trailering system, offering up to 14 camera views.

        Updated technologies including an available new, largest in-class 13.4-inch-diagonal tablet-style infotainment touchscreen



The 2024 Sierra HD lineup includes 2500HD and 3500HD models, in Regular Cab, Extended Cab and Crew Cab configurations — with dual-rear-wheel models available on 3500HD. They support the lineup’s highest trailering capacity: up to 36,000 pounds. Available trims include Pro, SLE, SLT, AT4, Denali and Denali Ultimate, with the AT4X trim coming later in the model year.

Fresh and bold — inside and out

The 2024 Sierra HD lineup is elevated with styling and design updates, inside and out. Exterior highlights include:
       
        Revised front bumper, fascia, grille designs and finishes on each trim
        Animated lighting when approaching, starting, or when using the turn signals
        New wheel designs on SLE, AT4, Denali and larger 18-inch polished aluminum wheels on dual rear-wheel models
        New 22-inch accessory wheels
        Six new exterior colors (extra cost): Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat, Redwood Metallic, Meteorite Metallic and Downpour Metallic
        Rear wheelhouse liners standard on Denali and Denali Ultimate dual rear-wheel models

Inside, GMC designers set apart Sierra from the competition with unique, new interiors on SLE, and SLT trims, as well as unique GMC premium interior designs for AT4, Denali and Denali Ultimate trims. There are also new color and stitching designs throughout, with more premium materials throughout the cabin, further elevating the Sierra’s premium look and feel.

The first-ever Sierra HD Denali Ultimate is the most premium, luxurious and technologically advanced Sierra HD yet, equipped with unique enhancements to the overall design and premium interior appointments, more standard technologies and standard turbocharged performance with the enhanced 6.6L Duramax Turbo-Diesel and Allison 10-speed transmission.

The Denali Ultimate is distinguished by an exterior featuring a unique grille and GMC badging in exclusive Vader chrome, along with exclusive 20-inch Ultra-bright machined aluminum wheels with High Gloss black accents, and unique fender badging featuring topography of Mount Denali, the highest point in North America. Additionally, Denali Ultimate will include a six-way MultiPro Tailgate with a standard Kicker audio system. Power assist steps also come standard.