2026 GMC Sierra 3500HD AT4

Experience the power and capability of the 2026 GMC Sierra 3500HD AT4, a rugged 4x4 crew cab pickup designed for demanding work and off-road adventures.

Powered by a robust 6.6L V8 gasoline engine delivering 401 horsepower and 464 lb-ft of torque, paired with a smooth 10-speed automatic transmission, this Sierra 3500HD offers impressive towing and hauling performance. The Gooseneck/5th Wheel Prep Package provides a hitch platform ready for heavy-duty trailers, making it ideal for serious towing needs. Equipped with a locking limited-slip differential and 4-wheel disc brakes, this truck ensures excellent traction and control in challenging conditions.

The AT4 Premium Plus Package enhances comfort and technology, featuring a power sunroof, advanced Technology Package, and Off-Road High Clearance steps for easier access. Inside, enjoy heated and cooled leather bucket seats with power adjustments and memory settings for both driver and passenger, plus heated rear seats for added comfort. Safety is comprehensive, with features like automatic high beams, blind spot monitoring, lane departure warning, front collision mitigation, and an aerial view display system.

Additional rugged touches include a bed liner, integrated tailgate step, running boards, aluminum wheels with body-colour wheel arch mouldings, and tow hooks. With keyless entry, remote engine start, and a premium sound system, the Sierra 3500HD AT4 blends capability with convenience for the discerning driver.