Experience unparalleled capability and refined comfort with the 2026 GMC Sierra 2500HD AT4, designed for those who demand power and precision in every drive.

Built to tackle the toughest Canadian terrains, the Sierra 2500HD AT4 features a robust turbocharged 8-cylinder diesel engine paired with a smooth 10-speed automatic transmission, delivering exceptional torque and towing capacity. Its 4x4 drivetrain and locking limited-slip differential ensure confident traction whether you’re hauling heavy loads or navigating off-road trails. The integrated tailgate step and bed liner enhance utility, making loading and unloading effortless, while the tow hooks and hitch are ready for serious work.

Inside, the crew cab offers premium leather seating with heated and cooled front seats, plus heated rear seats for passenger comfort during cold winters. Driver and passenger power-adjustable seats with lumbar support and memory settings provide personalised comfort for long hauls. Advanced safety technologies such as blind spot monitoring, lane departure warning, and front collision mitigation keep you secure on every journey.

The Sierra AT4’s aerial view display, adaptive cruise control, and remote engine start add convenience and control, while the premium sound system and WiFi hotspot keep you connected and entertained. Finished in striking Onyx Black, this truck combines rugged capability with sophisticated style for the discerning driver.