2024 GMC Sierra HD – Denali Ultimate, 3500 Dually, AT4 | Driving, Interior, Exterior

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.

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Video Timeline
0:00 – GMC Sierra HD Denali Ultimate
1:31 – GMC Sierra HD 3500 Dually
4:51 – GMC Sierra HD AT4
7:39 – Group