Experience the power and precision of the 2026 GMC Sierra 3500HD AT4, designed for those who demand rugged capability and refined comfort in every drive.

Built to handle the toughest jobs, the Sierra 3500HD AT4 boasts a turbocharged 8-cylinder diesel engine paired with a 10-speed automatic transmission and advanced 4x4 drivetrain. This combination delivers exceptional torque and towing capacity, making it ideal for hauling heavy loads or navigating challenging terrain. The locking limited-slip differential and integrated tow hooks enhance traction and control, ensuring confidence on and off the road.

Inside the spacious crew cab, premium leather bucket seats with heating, cooling, and adjustable lumbar support provide tailored comfort for long hauls. The driver benefits from seat memory and a heated steering wheel, while rear passengers enjoy heated seating and a pass-through rear seat for added versatility. Power retractable running boards and an integrated tailgate step simplify access to the bed, which features a durable liner to protect against wear.

Safety is paramount with advanced systems like blind spot monitoring, front collision mitigation, lane departure warning, and an aerial view display system that offers a comprehensive perspective around the truck. Remote engine start, keyless entry, and a premium sound system with smart device integration complete this commanding package, making the Sierra 3500HD AT4 the ultimate partner for both work and adventure.