Experience unmatched capability and refined comfort with the 2026 GMC Sierra 3500HD AT4, designed for those who demand power and precision in every drive.

Built to conquer the toughest tasks, the Sierra 3500HD AT4 boasts a robust turbocharged 8-cylinder diesel engine paired with a smooth 10-speed automatic transmission, delivering exceptional torque and towing capacity. Its advanced 4x4 drivetrain with locking limited-slip differential ensures superior traction and control, whether navigating rugged terrain or hauling heavy loads. The integrated tow hooks and factory-installed tow hitch make trailering effortless and secure.

Inside the crew cab, premium leather bucket seats with heating, cooling, and adjustable lumbar support provide tailored comfort for long hauls. Memory settings for driver and passenger seats enhance convenience, while heated rear seats ensure all occupants stay comfortable in colder climates. The power retractable running boards and integrated tailgate step simplify access to the bed, which is protected by a durable liner.

Safety is paramount with features like automatic high beams, blind spot monitoring, lane departure warning, and front collision mitigation, giving you confidence on every journey. The aerial view display system and rear parking aid assist with precise manoeuvring in tight spaces. With smart device integration, WiFi hotspot, and premium sound system, the Sierra 3500HD AT4 keeps you connected and entertained on the road.