New 2026 GMC Sierra 3500HD

Experience the power and capability of the 2026 GMC Sierra 3500HD AT4 Crew Cab 4WD, designed for demanding work and rugged adventures in Onyx Black.

This diesel-powered truck features a Duramax 6.6L Turbo-Diesel V8 engine delivering an impressive 470 horsepower and 975 lb-ft of torque, paired with a 10-speed automatic transmission and four-wheel drive with locking limited-slip differential for superior traction. The AT4 Premium Plus Package enhances comfort and technology, including a power sunroof, multicolour 15" diagonal head-up display, and a rear camera mirror with auto-dimming and full camera display. Convenience is boosted by power-retractable assist steps with LED lighting and running boards for easy access.

Built for towing, it includes a Gooseneck/5th Wheel Prep Package with a hitch platform, stamped bed holes, and a bed-mounted 7-pin trailer harness. The bed is protected by a durable liner, and an integrated tailgate step and fold-out side assist handle provide additional support when loading.

Safety is comprehensive with features such as automatic high beams, blind spot monitoring, cross-traffic alert, front collision mitigation and warning, lane departure warning, and multiple airbags. Inside, heated and cooled leather bucket seats with power adjustments, lumbar support, and seat memory ensure comfort on long hauls. This Sierra 3500HD AT4 is ready to tackle any task with confidence and style.