GMC Sierra HD For Sale, Sullivan County, NY

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 class1.

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

Most available trailering assistance technologies in its class through GMC’s ProGrade trailering system, offering up to 14 camera views5

Updated technologies including an available new, largest-in-class 13.4-inch-diagonal tablet-style infotainment7 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. Available trims include Pro, SLE, SLT, AT4, Denali, and Denali Ultimate, with the AT4X trim coming later in the model year. They support the lineup’s highest trailering capacity: up to 36,000 pounds.