Experience commanding power and advanced safety in the 2026 GMC Sierra 2500HD AT4 Crew Cab, designed for rugged performance and refined comfort in every drive.

The Sierra 2500HD AT4 is equipped with a robust turbocharged 8-cylinder diesel engine paired with a smooth 10-speed automatic transmission, delivering exceptional towing capability and dependable four-wheel drive traction. Its locking limited-slip differential enhances control on challenging terrains, while the integrated tow hitch and tow hooks make hauling heavy loads effortless. The truck’s exterior features durable aluminum wheels, running boards for easy access, a bed liner to protect cargo, and an integrated tailgate step for convenient bed entry.

Inside, this crew cab offers premium leather bucket seats with heating and cooling for front passengers, heated rear seats, and adjustable lumbar support for both driver and passenger, ensuring comfort on long hauls. The power driver and passenger seats include memory settings, while the multi-zone climate control maintains the ideal cabin environment. Advanced safety technologies such as blind spot monitoring, lane departure warning, front collision mitigation, cross-traffic alert, and automatic high beams provide peace of mind. Additional features like an aerial view display system, adaptive cruise control, heated mirrors, power folding mirrors, and a premium sound system round out this capable and sophisticated truck built to handle demanding work and everyday driving with confidence.