New 2026 GMC Sierra 1500

Experience the 2026 GMC Sierra 1500 AT4, a rugged diesel-powered crew cab built for capability and comfort with advanced off-road features and premium technology.

This new 2026 GMC Sierra 1500 AT4 comes equipped with a powerful Duramax 3.0L turbo-diesel straight six engine delivering 305 horsepower and an impressive 495 lb-ft of torque. Paired with a 10-speed automatic transmission featuring electronic precision shift, overdrive, tow/haul mode, and steering column paddle shifters, this truck offers smooth control and responsiveness on any terrain. The 4x4 drivetrain with locking limited-slip differential enhances traction and stability, making it ideal for off-road adventures and heavy-duty tasks.

The AT4 Premium Package includes the AT4 Preferred Package and dealer-installed off-road high clearance steps for easier access in rugged environments. Body colour wheel arch mouldings add a bold, distinctive look. Inside, enjoy heated and cooled leather bucket seats with power adjustments, lumbar support, and seat memory for both driver and passenger. The rear bench seat features heating and a pass-through for added versatility.

Safety is comprehensive with automatic high beams, blind spot monitoring, cross-traffic alert, front collision mitigation, lane keeping assist, and more. Convenience is boosted by an aerial view display system, remote engine start, keyless entry and start, power folding mirrors, and an integrated tailgate step. Aluminum wheels, fog lamps, and LED headlights complete this capable, stylish package.