Experience the 2026 GMC Sierra 1500 AT4 in Onyx Black—designed for rugged capability and advanced technology in a powerful diesel 4x4 crew cab.

This new Sierra 1500 AT4 is equipped with a turbocharged straight 6-cylinder diesel engine paired with a 10-speed electronically controlled automatic transmission featuring dual shift mode, delivering confident power and efficiency. Its 4x4 drivetrain includes a locking limited-slip differential, ensuring superior traction on and off the road. The truck rides on aluminum wheels with on/off-road tires, complemented by running boards and an integrated tailgate step for easy access.

Inside, the crew cab offers leather bucket seats with heating and cooling functions, plus heated rear seats for added comfort. Both driver and passenger enjoy adjustable lumbar support and power seats with memory settings. The cabin is enhanced with multi-zone climate control, a premium sound system, and advanced connectivity including Bluetooth, satellite radio, and a WiFi hotspot.

Safety is comprehensive with features like adaptive cruise control, blind spot monitoring, cross-traffic alert, lane departure warning, lane keeping assist, front collision mitigation and warning, and automatic high beams. Additional convenience comes from keyless entry and start, remote engine start, an aerial view display system, and a back-up camera.

Built for work and adventure, the Sierra 1500 AT4 includes a bed liner, tow hitch, tow hooks, and 4-wheel disc brakes with ABS and stability control, making it a dependable partner for any task.