2025 GMC Sierra 3500HD AT4

Experience commanding power and advanced safety in the 2025 GMC Sierra 3500HD AT4 Crew Cab, designed for heavy-duty performance and confident driving in any terrain.

This robust 4x4 diesel truck features an 8-cylinder turbocharged engine paired with an Allison 10-speed automatic transmission, delivering exceptional towing capability and smooth power delivery. The AT4 trim offers a crew cab with seating for five, including heated and cooled leather bucket seats, driver and passenger adjustable lumbar support, and seat memory for personalized comfort on long hauls. Convenience is enhanced with power-adjustable driver and passenger seats, a pass-through rear seat, and rear heated seats.

Safety is paramount with features such as blind spot monitoring, lane departure warning, front collision mitigation and warning, cross-traffic alert, and automatic high beams. Stability and traction controls, along with a locking limited-slip differential and tow hooks, ensure confidence on challenging roads. The truck is equipped with an aerial view display system, back-up camera, rear parking aid, and adaptive cruise control for added driver assistance.

Exterior enhancements include Onyx Black paint, aluminum wheels, running boards, integrated tailgate step, bed liner, and a conventional spare tire. Heated, power-folding mirrors with memory and LED headlights complete this rugged yet refined package built for demanding work and adventure.