Command the road and rugged terrain with the 2026 GMC Sierra 2500HD AT4, a diesel-powered 4x4 crew cab built for heavy-duty performance and refined comfort.

Designed for those who demand strength and sophistication, the Sierra 2500HD AT4 boasts a turbocharged 8-cylinder diesel engine paired with a smooth 10-speed automatic transmission, delivering impressive towing capacity and torque for the toughest jobs. Its advanced 4-wheel drive system with locking limited-slip differential ensures confident handling on slippery or uneven surfaces, while integrated tow hooks and a robust tow hitch make hauling trailers effortless.

Step inside the crew cab to experience premium leather seating with heated and cooled front seats, power adjustments, and memory settings for both driver and passenger, providing personalised comfort on long hauls or daily drives. Rear heated seats and a pass-through rear bench add versatility and convenience. The cabin is equipped with an aerial view display system and a navigation system to keep you aware and on course, complemented by adaptive cruise control and blind spot monitoring for enhanced safety.

Outside, the Onyx Black exterior is ruggedly stylish, featuring running boards, an integrated tailgate step, and a durable bed liner to protect your cargo area. With advanced safety features like front collision mitigation, lane departure warning, and cross-traffic alert, the Sierra 2500HD AT4 is engineered to keep you secure wherever your work or adventure takes you.