2026 GMC Sierra 2500HD

The 2026 GMC Sierra 2500HD offers a versatile lineup designed for every kind of driver. The SLE sets a bold foundation with its signature GMC grille, strong proportions, and confident stance.

The SLT adds chrome accents and premium finishes, delivering a perfect balance of capability and refinement.

The AT4 brings rugged off-road confidence with a 2-inch factory lift, skid plates, and 20-inch all-terrain tires that help it tackle Louisiana backroads with ease.

New for 2026, the AT4X pushes off-road luxury to new heights, featuring Multimatic DSSV™ dampers, front and rear electronic locking differentials, and an off-road-tuned suspension—proving that extreme capability and upscale comfort can coexist.

The Denali remains a benchmark for craftsmanship with its distinctive chrome grille, 20-inch polished aluminum wheels, and chrome mirror caps that announce presence from every angle.

At the top, the Denali Ultimate is the most luxurious Sierra HD ever built, boasting exclusive Vader Chrome finishes, 22-inch wheels, a power sunroof, and power-assist steps, all wrapped in a commanding, modern design that turns every drive into a statement of strength.

The 2026 GMC Sierra 2500HD offers two powerhouse engines designed for maximum performance. The standard 6.6L V8 gas engine delivers 401 hp and 464 lbs.-ft. of torque, paired with the legendary Allison® 10-speed automatic transmission for seamless shifts and responsive acceleration.

For drivers demanding best-in-class diesel power, the available 6.6L Duramax® Turbo-Diesel V8 produces 470 hp and an astounding 975 lbs.-ft. of torque, ensuring effortless towing, confident hauling, and unmatched endurance.

When properly equipped, the Sierra 2500HD can tow up to 22,390 lbs., making it the perfect companion for work or recreation anywhere in the Gulf South.

Visit Ross Downing GMC serving Hammond, Covington, and LaPlace to explore more about 2026 Sierra 2500HD.

Every Sierra 2500HD is engineered for stability, strength, and precision. A fully boxed high-strength steel frame and independent front suspension deliver smooth handling on highways and job sites alike.

The AT4 and AT4X trims offer exceptional off-road control with Hill Descent Control, a 2-speed transfer case, and terrain-selectable drive modes that adapt traction and throttle response to changing conditions.

Meanwhile, the Denali and Denali Ultimate trims feature Adaptive Ride Control, continuously adjusting damping for a composed, refined ride. Technologies like Digital Variable Steering Assist and Automatic Grade Braking enhance control when towing through winding roads or steep Louisiana grades.

Inside, the 2026 GMC Sierra 2500HD seamlessly blends durability with first-class comfort. The cabin features generous space, advanced insulation, and premium craftsmanship throughout.

The centerpiece is GMC’s next-generation infotainment suite, featuring a 13.4-inch diagonal center touchscreen and a 12.3-inch configurable digital driver display. Wireless Apple CarPlay®, Android Auto™, and Google built-in functionality come standard, while an available Bose® premium audio system fills the cabin with crystal-clear sound.

The AT4X offers an exclusive blend of capability and comfort with Obsidian Rush interior trim, Vader Chrome accents, and full-grain leather seating. The Denali Ultimate transforms the Sierra HD into a rolling luxury suite, featuring Alpine Umber full-grain leather upholstery, open-pore Paldao wood trim, and topographic map embossing of Mount Denali across the dashboard—a signature GMC detail that represents precision craftsmanship at its finest.

Safety and driver confidence come standard in the 2026 Sierra 2500HD with GMC Pro Safety, which includes Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, and IntelliBeam® auto high beams.

Available upgrades like GMC Pro Safety Plus, Adaptive Cruise Control, Rear Cross Traffic Braking, and HD Surround Vision deliver enhanced situational awareness.

For towing, features such as Trailer Sway Control, Hill Start Assist, and the Transparent Trailer View system simplify maneuvering, while the Denali Ultimate takes technology even further with Super Cruise®—GMC’s advanced hands-free driving system, available for compatible roads even while towing a trailer.

Discover more about the all-new 2026 Sierra 2500HD by visiting Ross Downing GMC in HAMMOND, LA.