Experience unmatched capability and refined comfort in the 2026 GMC Sierra 1500 AT4, designed for those who demand power, technology, and luxury in every drive.

The 2026 GMC Sierra 1500 AT4 in Onyx Black combines rugged diesel performance with sophisticated features tailored for the discerning Canadian driver. Powered by a turbocharged straight 6-cylinder diesel engine paired with a 10-speed automatic transmission, this 4x4 crew cab pickup delivers impressive torque and fuel efficiency, ideal for towing heavy loads or navigating challenging terrain. The advanced 4-wheel disc brakes and locking limited-slip differential ensure confident handling and control, whether on highways or backcountry roads.

Inside, the Sierra AT4 offers premium leather seats with heating and cooling functions, plus adjustable lumbar support and memory settings for both driver and passenger, ensuring comfort on long hauls or daily commutes. The multi-zone climate control and heated steering wheel add to the refined cabin experience. Technology is front and centre with an aerial view display system, adaptive cruise control, navigation, and seamless smart device integration, keeping you connected and aware. Safety is paramount, featuring automatic high beams, blind spot monitoring, lane keeping assist, and front collision mitigation, providing peace of mind on every journey. With practical touches like an integrated tailgate step, bed liner, running boards, and remote engine start, the Sierra 1500 AT4 is ready to tackle work and adventure with confidence and style.