Discover the 2026 GMC Sierra 3500HD AT4: Built for Power, Precision, and Adventure in Canada's Diverse Landscapes. Experience Unmatched Performance with the Duramax 6.6L Turbo-Diesel V8.

The 2026 GMC Sierra 3500HD AT4 is a powerhouse designed for those who demand more from their truck. With its robust Duramax 6.6L Turbo-Diesel V8 engine, delivering an impressive 470 horsepower and 975 lb-ft of torque, this truck is ready to conquer any terrain. The 10-speed automatic transmission ensures smooth shifts and optimal performance, whether you're towing heavy loads or navigating rugged paths. The Sierra 3500HD AT4's 4x4 drivetrain and locking/limited slip differential provide exceptional traction and control, making it ideal for Canada's varied landscapes.

Safety is paramount with advanced features like Front Collision Mitigation, Lane Departure Warning, and a Blind Spot Monitor. The truck's integrated turn signal mirrors and cross-traffic alert enhance visibility and awareness on the road. Inside, the luxurious leather seats, heated and cooled for comfort, cater to both driver and passengers. The advanced navigation system and premium sound system keep you connected and entertained on long journeys. With its Sterling Metallic exterior, running boards, and integrated tailgate step, the Sierra 3500HD AT4 is as stylish as it is functional, ready to tackle any challenge with confidence.