The 2026 GMC Sierra 3500HD is engineered for those who demand more from their truck. The standard 6.6-liter V8 gasoline engine delivers 401 horsepower and 464 pound-feet of torque, paired with a six-speed automatic transmission that keeps power delivery smooth and responsive. Step up to the available 6.6-liter Duramax turbo-diesel V8, and you unlock a staggering 470 horsepower and 975 pound-feet of torque, mated to an Allison 10-speed automatic transmission.

Whether you're towing a commercial trailer or hauling heavy equipment, the Sierra 3500HD is equipped to handle it without breaking a sweat.

Inside, the Sierra 3500HD offers a cabin that balances rugged practicality with genuine comfort. The Denali trim elevates the experience with premium leather seating, genuine wood and aluminum trim accents, and a driver-focused layout designed for long days on the road. Available heated and ventilated front seats, a heated steering wheel, and a power-adjustable driver's seat make the cabin a welcoming space even on the toughest workdays.

The rear seat offers ample legroom in crew cab configurations, and thoughtful storage solutions throughout the cabin keep everything organized and within reach.

The 2026 Sierra 3500HD packs a powerful suite of technology to keep you informed and connected. A large available diagonal touchscreen infotainment display runs GMC's intuitive interface with wireless Apple CarPlay and Android Auto compatibility. Available built-in Wi-Fi hotspot connectivity keeps passengers connected, while Google built-in integration - including Google Assistant and Google Maps - adds a next-level layer of smart functionality.

The available MultiPro Tailgate offers six configurations that can turn your truck into a mobile workstation or step platform, and the ProGrade Trailering System with its available 15 camera views makes hitching and maneuvering with heavy loads far more manageable.

Safety is a cornerstone of the 2026 Sierra 3500 HD's design. Standard features include forward collision alert, automatic emergency braking, lane keep assist, and a following distance indicator to help keep you aware of your surroundings. Available features include a surround-vision camera system, rear cross-traffic alert, HD Surround Vision, and a trailer sway control system that provides extra confidence when towing heavy loads.

The Sierra 3500HD also offers available Super Cruise, GMC's hands-free driver assistance technology that supports compatible highways, giving you added peace of mind on long hauls.

The 2026 GMC Sierra 3500HD is available in a well-rounded lineup of trim levels to suit a wide range of drivers and workloads. The Pro serves as the capable, work-ready starting point, while the SLE builds on that foundation with added comfort and convenience features. The SLT brings a more refined experience with upgraded interior materials and additional technology.

The AT4 is the off-road-focused option, featuring a two-inch factory lift, skid plates, and an off-road suspension for those who need capability beyond the pavement. At the top of the lineup, the Denali trim delivers a premium truck experience with exclusive styling, premium leather, and the most advanced available features.

The 2026 GMC Sierra 3500HD is a heavy-duty truck that truly earns its Professional Grade badge. With a powerful engine lineup, a refined and spacious interior, cutting-edge technology, and a comprehensive set of safety features, it's ready to meet the demands of the most serious truck buyers.

Stop by and explore everything this impressive truck has to offer.