The 2026 Sierra 2500HD delivers the kind of power that heavy-duty truck buyers expect. Engine options include a capable gasoline V-8 and an available Duramax 6.6-liter turbodiesel V-8, which produces up to 470 horsepower and 975 pound-feet of torque. Paired with an Allison 10-speed automatic transmission on diesel models, this truck offers smooth, confident power delivery whether you're on the highway or working a tough job site. Maximum towing capacity reaches up to 36,000 pounds when properly equipped, making it a formidable option for contractors and outdoor adventurers alike.

Step inside the Sierra 2500HD and you'll find a cabin designed with both comfort and function in mind. Higher trims feature premium leather-appointed seating, genuine wood accents, and thoughtful storage solutions built for hardworking drivers. The MultiPro tailgate adds versatile functionality, providing six different configurations to make loading and unloading easier. Whether you're outfitting the AT4X for off-road adventures or selecting the Denali Ultimate for long-distance luxury, the interior space and attention to detail set this truck apart from the competition.

The 2026 Sierra 2500HD puts an impressive suite of technology at your fingertips. A large diagonal touchscreen anchors the infotainment system, which supports wireless Apple CarPlay and Android Auto compatibility. Available Super Cruise driver assistance technology enables hands-free driving on compatible roads, a standout feature in the heavy-duty segment. The truck also offers available GMC's MultiPro camera system with up to 14 camera views, helping drivers manage trailering with greater confidence. Connectivity features include available wireless charging, a built-in Wi-Fi hotspot, and OnStar services.

GMC equips the Sierra 2500HD with a comprehensive set of driver assistance and safety features. Standard and available technologies include forward collision alert, automatic emergency braking, lane keep assist with lane departure warning, following distance indicator, and rear cross-traffic alert. The ProGrade Trailering System takes safety further by offering trailer sway control and an integrated trailer brake controller, giving drivers added peace of mind when towing heavy loads across any terrain.

The 2026 Sierra 2500HD is available in a range of trims to suit different needs and budgets. The lineup includes the Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate. The rugged AT4X stands out as the most capable off-road trim, featuring a factory-installed front bumper, Multimatic DSSV dampers, and underbody skid plates for tackling the toughest trails. For drivers in Lebanon who want the pinnacle of luxury and off-road readiness combined, the Sierra HD lineup offers something genuinely exciting at every level.

The 2026 GMC Sierra 2500HD is a heavy-duty truck that excels in every environment from work sites to weekend escapes. With powerful engine options, advanced technology, and a well-appointed interior, it's a compelling choice for anyone ready to go further.