New 2026 GMC Sierra 2500HD

Experience commanding power and advanced capability with the 2026 GMC Sierra 2500HD AT4 Crew Cab, featuring a Duramax 6.6L Turbo-Diesel V8 and premium off-road enhancements.

Built for drivers who demand strength and versatility, this Sierra 2500HD AT4 is powered by a turbocharged Duramax 6.6L V8 diesel engine delivering an impressive 470 horsepower and 975 lb-ft of torque. The 10-speed automatic transmission and 4x4 drivetrain with locking limited-slip differential ensure confident handling in any terrain. The truck is equipped with a gooseneck and 5th wheel prep package, including a hitch platform and bed-mounted 7-pin trailer harness, making it ideal for heavy towing needs.

Inside, enjoy comfort and convenience with heated and cooled perforated front leather bucket seats featuring adjustable lumbar support and memory settings for driver and passenger. The technology package enhances your drive with a rear camera mirror and a 15-inch multicolour head-up display. Practical touches include all-weather floor liners with AT4 branding, a rear sliding power window, and roof marker lamps.

Safety is comprehensive with automatic high beams, blind spot monitoring, front collision mitigation, lane departure warning, and cross-traffic alert. Exterior features such as running boards, integrated tailgate step, bed liner, and aluminum wheels complete this rugged and refined truck, finished in Summit White with a Jet Black and Kalahari accented interior.