2026 GMC Sierra 2500 HD SLT

The 2026 Sierra 2500 HD SLT comes ready to work. Under the hood, drivers can choose between a capable 6.6-liter V8 gasoline engine or the available 6.6-liter Duramax turbo-diesel V8, which produces an exceptional 470 horsepower and 975 pound-feet of torque.

The diesel pairs with a 10-speed Allison automatic transmission — one of the most trusted names in heavy-duty gearboxes. Whether you're towing a loaded trailer or navigating tough terrain around Clinton, the Sierra HD SLT is engineered to handle it with confidence.

Step inside the Sierra 2500 HD SLT and you'll find a cabin that feels far more refined than you might expect from a heavy-duty truck. Heated front seats and a heated leather-wrapped steering wheel keep you comfortable in colder conditions, while the Multi-Pro tailgate adds impressive versatility for work and recreation alike.

The SLT trim elevates the experience with upscale materials and thoughtful design details throughout, making it just as capable of impressing clients as it is of moving serious cargo.

The 2026 Sierra HD SLT doesn't cut corners when it comes to connectivity. A large diagonal touchscreen serves as the hub for GMC's intuitive infotainment system, featuring wireless Apple CarPlay and Android Auto compatibility.

A built-in Wi-Fi hotspot keeps passengers connected on the go, and available GMC's ProGrade Trailering System provides a suite of camera views and trailering tools designed to make hitching and hauling more manageable than ever. The available head-up display ensures drivers can keep their eyes on the road while staying fully informed.

GMC equips the 2026 Sierra 2500 HD SLT with a robust suite of driver assistance technologies. Standard features include forward collision alert, automatic emergency braking, lane keep assist, and following distance indicator.

Available features like rear cross-traffic alert and side blind zone alert further expand your awareness on busy roads and job sites alike. Front and rear park assist rounds out a safety package designed to give you confidence in every situation, whether you're maneuvering a tight parking lot or backing up with a heavy load.

The 2026 GMC Sierra 2500 HD lineup offers a well-rounded selection of trims to suit a wide range of needs. It starts with the Pro, which delivers capable fundamentals, followed by the SLE, which adds comfort and convenience upgrades.

The SLT builds on that foundation with premium features and technology that elevate the heavy-duty experience. For those seeking the pinnacle of capability and luxury, the AT4 adds serious off-road hardware while the Denali and Denali Ultimate deliver the most refined, feature-rich Sierra HD experience available.

The 2026 GMC Sierra 2500 HD SLT is a standout choice for drivers who need a truck that works as hard as they do without giving up the comfort and technology they expect. With its powerful powertrain options, thoughtfully appointed interior, and advanced connectivity, the SLT trim hits a sweet spot that few heavy-duty trucks can match.

Visit your local GMC dealer serving Clinton to explore this truck in person and find the configuration that fits your lifestyle.