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Experience unmatched capability and refined toughness with the 2026 GMC Sierra 3500HD AT4 Crew Cab 4WD in striking Coastal Dune, engineered for those who demand power and precision in every task.

Powered by the formidable Duramax 6.6L Turbo-Diesel V8 engine delivering 470 horsepower and an impressive 975 lb-ft of torque, this Sierra 3500HD is built to conquer the toughest jobs while maintaining smooth, controlled performance. The advanced 10-speed automatic transmission and locking limited-slip differential ensure optimal traction and power distribution across all terrains. Designed for serious towing and hauling, it features a robust tow hitch and integrated tailgate step for easier bed access, complemented by a durable bed liner to protect your investment.

Inside, the AT4 trim offers premium leather bucket seats with heating, cooling, and adjustable lumbar support for both driver and passenger, ensuring comfort during long hauls. Memory settings for seats and mirrors add convenience, while the multi-zone climate control keeps everyone comfortable. Safety is paramount with adaptive cruise control, blind spot monitoring, front collision mitigation, lane departure warning, and an aerial view display system for precise manoeuvring.

The exterior combines rugged style with practical features like aluminum wheels, running boards, heated power-folding mirrors, LED headlights, and fog lamps, making the Sierra 3500HD AT4 a commanding presence on and off the road.