Experience unmatched capability and comfort with the 2026 GMC Sierra 2500HD AT4, designed for drivers who demand power, precision, and premium features in every journey.

Built to handle the toughest tasks, the Sierra 2500HD AT4 boasts a robust turbocharged 8-cylinder diesel engine paired with a 10-speed automatic transmission and advanced 4x4 drivetrain. Whether towing heavy loads or navigating rugged terrain, its locking limited-slip differential and integrated tow hooks ensure confidence and control. The crew cab offers spacious leather seating with heated and cooled front seats, heated rear seats, and adjustable lumbar support for both driver and passenger, making long hauls comfortable and fatigue-free. Innovative technology like the aerial view display system, adaptive cruise control, and blind spot monitoring enhances safety and situational awareness on busy highways or off-road trails. The integrated tailgate step and running boards provide easy access to the bed lined with durable protection, while power-folding heated mirrors and rain-sensing wipers adapt seamlessly to changing conditions. With keyless start, remote engine start, and a premium sound system, this truck blends convenience with rugged sophistication. Finished in striking Onyx Black, the 2026 Sierra 2500HD AT4 is engineered to meet the demands of Canadian drivers who require strength, versatility, and refined comfort in one commanding package.