2026 GMC Sierra 2500

The 2026 GMC Sierra 2500 HD is engineered to deliver outstanding strength and confidence on the road and off it. Buyers can choose from a capable 6.6-liter V-8 gasoline engine or opt for the available Duramax 6.6-liter turbo-diesel V-8, which produces up to 470 horsepower and 975 pound-feet of torque. That kind of power translates to serious towing and hauling muscle, making the Sierra HD one of the most capable trucks in its class. A 10-speed automatic transmission keeps power delivery smooth and responsive across a wide range of driving conditions.

Step inside the 2026 Sierra 2500 HD and you'll find a cabin that's thoughtfully designed for comfort and functionality. Available premium leather-appointed seating, heated and ventilated front seats, and a heated steering wheel make long days on the job feel a little more manageable. The interior is spacious enough to accommodate a full crew, with ample legroom and well-placed storage throughout the cab. Depending on trim selection, drivers in Eaton can enjoy a refined, upscale cabin that rivals luxury vehicles in its attention to detail and quality materials.

The 2026 Sierra HD brings a strong suite of connected features to keep you informed 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. Available Super Cruise, GMC's hands-free driver assistance technology, allows compatible highway driving with added confidence. Drivers also benefit from available MultiPro tailgate functionality, a ProGrade trailering system with up to 15 available camera views, and OnStar connectivity for real-time assistance and remote vehicle access.

Safety on the 2026 GMC Sierra 2500 HD goes well beyond the basics. The truck comes equipped with a suite of driver assistance features designed to keep you aware and protected. Available technologies include forward collision alert, automatic emergency braking, lane keep assist, following distance indicator, and front and rear park assist. The available Head-Up Display projects key information directly into your line of sight, helping you stay focused on the road. Whether navigating a crowded job site or merging onto a busy highway, the Sierra HD works to help keep you and your crew safe.

The 2026 GMC Sierra 2500 HD is available in a thoughtful range of trim levels to match a variety of needs and budgets. The lineup begins with the work-focused Pro, followed by the SLE, which adds more comfort and connectivity features. The SLT steps things up with premium appointments, while the AT4 trim brings serious off-road capability with features like a two-inch factory lift and Rancho monotube shocks. At the top of the range, the Denali and Denali Ultimate trims deliver a truly luxurious heavy-duty truck experience with premium leather, exclusive styling, and the most advanced technology available in the lineup.