2026 GMC Sierra 2500 HD

The 2026 GMC Sierra 2500 HD delivers the kind of muscle that heavy-duty work demands. Under the hood, buyers can choose between a 6.6-liter V8 gasoline engine producing 401 horsepower and 464 pound-feet of torque, or the available 6.6-liter Duramax turbodiesel V8 generating 470 horsepower and a commanding 975 pound-feet of torque. Both engines are paired with a 10-speed automatic transmission designed to keep power delivery smooth and responsive. When properly configured, the Sierra HD is engineered to handle available max conventional towing and payload figures that make it one of the most capable trucks in its class.

Step inside the 2026 Sierra 2500 HD and you'll find a cabin designed to make long days on the job feel a whole lot more comfortable. Depending on the trim level, the interior features supportive seating with available leather upholstery, a MultiPro tailgate-inspired utility mindset carried throughout the design, and generous passenger space in both regular and crew cab configurations. Available front heated and ventilated seats, a heated steering wheel, and dual-zone automatic climate control round out the comfort features that make this truck as livable as it is hard-working.

The 2026 Sierra 2500 HD comes well-equipped with technology designed to keep you connected and in control. A large available diagonal touchscreen powers the GMC infotainment system with wireless Apple CarPlay and Android Auto compatibility, so your phone integrates seamlessly without the cord clutter. Available wireless charging, a built-in Wi-Fi hotspot, and SiriusXM satellite radio keep connectivity flowing whether you're at the job site or on the open highway. GMC's available Super Cruise hands-free driver assistance technology adds a next-level dimension to long-haul capability, a standout feature in the heavy-duty segment.

GMC loaded the 2026 Sierra 2500 HD with an array of available safety and driver assistance features designed to inspire confidence. Available technologies include Forward Collision Alert, Automatic Emergency Braking, Lane Keep Assist, and a surround vision camera system that provides critical visibility when maneuvering in tight spaces or hooking up a trailer. The available HD Surround Vision and transparent trailer view features are particularly useful for drivers who spend time towing. Front and rear park assist rounds out a safety package built to protect both the truck and everyone on the road around it.

The 2026 GMC Sierra 2500 HD is offered in a well-defined lineup of trim levels, each stepping up in refinement and available features.
The Pro serves as the capable base model, offering solid work-ready fundamentals.
The SLE adds more convenience and comfort features, while the SLT takes things further with enhanced interior materials and technology.
The AT4 trim brings dedicated off-road capability with features like a factory-lift-compatible suspension setup and skid plates. At the top of the lineup, the Sierra 2500 HD Denali delivers a luxury truck experience with premium materials, advanced technology, and signature design details that set it apart from any other truck in its segment.