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

Built to tackle the toughest jobs, the Sierra 2500HD AT4 features a robust turbocharged 8-cylinder diesel engine paired with a 10-speed automatic transmission and advanced 4x4 drivetrain. This combination delivers exceptional towing capacity and torque, making it ideal for hauling heavy loads or navigating challenging terrain with confidence. The locking limited-slip differential enhances traction, ensuring stability whether you’re on the worksite or off the beaten path.

Inside, the crew cab offers premium leather seating with heated and cooled front seats, plus heated rear seats for all passengers’ comfort. Driver and passenger power-adjustable seats with lumbar support and memory settings provide personalised comfort for long hauls. The integrated tailgate step and running boards make access effortless, while the bed liner protects your cargo area from wear and tear.

Safety is paramount with features like blind spot monitoring, front collision mitigation, lane departure warning, and an aerial view display system for precise manoeuvring. Adaptive cruise control and a premium sound system keep you connected and comfortable on every journey. Finished in striking Onyx Black, this truck combines rugged capability with sophisticated style for the discerning driver.