2026 GMC Sierra 3500 HD

The 2026 GMC Sierra 3500HD is engineered to tackle the most demanding jobs with remarkable ease. Available powertrain options include a robust 6.6-liter V-8 gasoline engine, as well as a 6.6-liter Duramax turbo-diesel V-8 that generates an impressive 470 horsepower and 975 pound-feet of torque.

Whether you are hauling heavy equipment across a job site or towing a loaded trailer down the highway, the Sierra 3500 HD delivers the kind of confidence that serious work demands. An Allison 10-speed automatic transmission is available to help put all that power to use with smooth, precise shifting.

Step inside the 2026 GMC Sierra 3500HD and you will find a cabin designed to make long days on the job feel genuinely comfortable. Available features include heated and ventilated front seats, a heated steering wheel, and genuine open-pore wood trim that elevates the atmosphere.

The Sierra 3500HD offers generous passenger space, with thoughtfully placed storage compartments and a functional, organized layout that keeps everything within easy reach. Higher trims like the Denali take the interior to a premium level, wrapping the cabin in premium materials and refined finishes that rival traditional luxury vehicles.

The 2026 GMC Sierra 3500HD comes well-equipped with technology designed to keep you connected and in control. A large diagonal touchscreen anchors the infotainment system, offering wireless Apple CarPlay and Android Auto compatibility.

Available features include a built-in Wi-Fi hotspot, GMC's MultiPro tailgate, and the available Super Cruise driver-assistance system - one of the most advanced hands-free driving technologies available in a heavy-duty truck. The available ProGrade Trailering System provides integrated trailering tools, including a trailering app, in-vehicle trailering features, and multiple camera views to help you hitch, haul, and maneuver with precision.

GMC has equipped the 2026 Sierra 3500HD with a comprehensive suite of safety technologies to help keep you and your crew protected. Available driver-assistance features include Forward Collision Alert, Automatic Emergency Braking, Lane Change Alert with Side Blind Zone Alert, and Rear Cross Traffic Alert.

A rearview camera is standard, and available camera systems offer even wider visibility around the truck. The available Head-Up Display projects key information directly into your line of sight, so you can stay focused on the road and the job ahead.

The 2026 GMC Sierra 3500HD is available in a range of trim levels to match your specific needs and preferences. The lineup begins with the Pro, which delivers strong capability at an approachable entry point. Moving up, the SLE and SLT trims add comfort and convenience features for drivers who want more from their daily work truck.

The AT4 trim is built for those who need enhanced off-road capability, while the Denali trim represents the pinnacle of the Sierra 3500HD experience - combining luxury-grade appointments with the truck's legendary heavy-duty strength. The top-tier Denali Ultimate takes things even further with exclusive premium features.

The 2026 GMC Sierra 3500 HD is one of the most capable and well-rounded heavy-duty trucks on the market today. Whether you are tackling the toughest job sites or simply want a truck that performs at the highest level, drivers in Winchester will find that this Professional Grade machine is ready for whatever comes next.

Visit us today to explore the Sierra 3500 HD lineup and discover the model that best fits your needs.