Powerful, rugged, and refined: the 2026 GMC Sierra 2500HD AT4 in Onyx Black is built for demanding drivers who require exceptional capability and advanced technology.

Designed for those who tow heavy loads or navigate tough terrain, this diesel-powered 8-cylinder truck delivers impressive torque through its turbocharged engine and 10-speed automatic transmission. The 4x4 drivetrain with locking limited-slip differential ensures confident traction in all conditions, while integrated tow hooks and a heavy-duty tow hitch make hauling trailers effortless. Inside, the crew cab offers premium leather bucket seats with heating, cooling, and adjustable lumbar support for both driver and passenger, complemented by rear heated seats and seat memory for ultimate comfort on long hauls. Advanced safety features like automatic high beams, blind spot monitoring, lane departure warning, and front collision mitigation provide peace of mind on every journey. The innovative aerial view display system and back-up camera enhance visibility when manoeuvring tight spots or loading the standard bed lined for durability. Convenience is elevated with remote engine start, keyless entry and start, power folding mirrors with heating, and a heated steering wheel for cold Canadian mornings. With multi-zone climate control and a premium sound system, the Sierra 2500HD AT4 balances rugged performance with refined comfort, making it the ideal partner for work and adventure.