The 2026 GMC Sierra 2500HD is built around real capability. The standard 6.6-liter V8 gas engine pairs with a 10-speed automatic transmission to provide dependable, confident power right from the base Pro trim. For those who need even more, the available Duramax 6.6-liter Turbo-Diesel V8 engine produces an impressive 470 horsepower and 975 pound-feet of torque, making it one of the most capable powerplants in the heavy-duty segment. When properly equipped, the Sierra 2500HD can tow up to 22,390 pounds, giving drivers the muscle to move heavy loads with ease. Every Sierra 2500HD comes standard with a Trailering Package, Trailering Mirrors, and a Trailer Brake Controller, so you're ready to work from day one.

Step inside the 2026 GMC Sierra 2500HD and you'll find a cabin designed to match the truck's capability with real comfort. The Sierra HD features best-in-class standard Crew Cab front head and leg room, giving passengers generous space on every trip. Depending on your trim, interior appointments range from durable and functional to genuinely luxurious. The SLT brings perforated leather seating surfaces, while the AT4 features an exclusive Jet Black interior with Kalahari accents.

The Denali Ultimate elevates the experience further with an exclusive Alpine Umber interior featuring full-grain leather seating, plaited contrast stitching, and embossed topographical map patterns inspired by Denali's mountain summit. Available best-in-class 16-way power front seats with a massaging feature make even the longest drives feel first-class.

The 2026 GMC Sierra 2500HD keeps you informed and in command with a thoughtfully designed technology suite. A 13.4-inch diagonal color touchscreen powers the GMC Infotainment System, offering Google built-in compatibility and voice-activated controls for a seamless, connected experience. A 12.3-inch diagonal digital Driver Information Center puts key data front and center in crisp, high-resolution clarity. The available 15-inch diagonal multicolor Head-Up Display helps drivers keep their eyes on the road while staying aware of speed and alerts.

Wireless Apple CarPlay and wireless Android Auto compatibility come standard, ensuring your smartphone integrates effortlessly. The SLT and higher trims gain access to the ProGrade Trailering System with an In-Vehicle Trailering App, while up to 14 available camera views, including Transparent Trailer View, make hitching and maneuvering a trailer far less stressful.

GMC has packed the 2026 Sierra 2500HD with driver assistance technologies that help keep you and your cargo safe on every journey. Every Sierra 2500HD and 3500 HD comes equipped with Sierra HD Pro Safety features, including technologies that assist both while driving and while trailering. Available Adaptive Cruise Control with trailering helps maintain a safe following distance even with a heavy load in tow.

Up to 14 camera views, including HD Surround Vision on the AT4, provide comprehensive visibility around the truck and trailer. The advanced trailering assistance technologies built into this truck give drivers the confidence to handle challenging towing situations on any road.

The 2026 GMC Sierra 2500HD is available in a range of well-equipped trim levels designed to match every need and lifestyle. The Pro serves as the capable foundation, delivering essential towing tools and wireless smartphone compatibility as standard. The SLE adds a 13.4-inch diagonal touchscreen, 17-inch machined aluminum wheels, and a Traction Select System with Tow/Haul mode. The SLT steps up comfort with 10-way power heated front seats, a heated steering wheel, and the ProGrade Trailering System. The AT4 is built for those who want to go further off the beaten path, featuring an Off-Road Suspension Package with twin-tube Rancho shocks, skid plates, and exclusive 20-inch gloss-black aluminum wheels.

The AT4X pushes even harder with a factory-installed 1.5-inch suspension lift, Multimatic DSSV dampers, 35-inch Goodyear Territory MT tires, and a striking Obsidian Rush interior with full-grain leather seating. The Denali brings premium luxury with authentic wood trim, Forge perforated leather, and 12-way heated and ventilated power front seats. At the top sits the Denali Ultimate, which adds the Duramax diesel engine as standard, a signature Vader Chrome grille, a 12-speaker Bose Premium Series audio system, and illuminated power assist steps.

The 2026 GMC Sierra 2500HD is a heavy-duty truck that truly earns its Professional Grade reputation. Whether you're hauling serious loads, tackling tough terrain, or simply want the most refined heavy-duty truck on the market, there's a Sierra 2500HD built for you. Drivers throughout Miami, OK can explore the full Sierra HD lineup and find the trim that fits their work and lifestyle perfectly.