New 2026 GMC Sierra 3500HD

Experience commanding power and refined capability with the 2026 GMC Sierra 3500HD Denali Ultimate, a diesel-powered 4x4 crew cab built for demanding work and comfort.

Powered by a Duramax 6.6L turbo-diesel V8 engine delivering 470 horsepower and an impressive 975 lb-ft of torque, this heavy-duty truck is engineered to handle the toughest towing and hauling tasks. The 10-speed automatic transmission and locking limited-slip differential provide smooth, confident control on any terrain. Its rugged exterior features 20-inch ultra-bright machined aluminum wheels with gloss black inserts, all-terrain tires, and a bed liner complete with an integrated tailgate step and power retractable running boards for easy access.

Inside, the Sierra 3500HD Denali Ultimate offers premium leather bucket seats with heating, cooling, massage functions, and adjustable lumbar support for both driver and passenger. Seat memory enhances personalised comfort, while the multi-zone climate control ensures a pleasant cabin environment. Advanced safety technologies include blind spot monitoring, cross-traffic alert, lane departure warning, front collision mitigation, and automatic high beams for peace of mind on every drive.

Additional features such as a 13.4-inch premium infotainment system with Google built-in apps, adaptive cruise control, heads-up display, and a comprehensive Gooseneck/5th wheel prep package make this truck ideal for professional drivers who demand power, technology, and luxury in one package.