Keen on the power and performance of a heavy-duty truck? The 2025 GMC Sierra 3500HD AT4 is a robust testament to engineering that delivers on tough jobs while maintaining an air of sophistication. Cloaked in a Summit White exterior, complemented by a stylish Jet Black interior with Kalahari accents, this truck is both a workhorse and a statement on the road. This new model comes equipped with an Allison 10-Speed Automatic Transmission paired with an awe-inspiring Duramax 6.6L Turbo-Diesel V8 engine, which generously churns out 470 horsepower and a staggering 975 lb-ft of torque. Whether it’s towing heavy loads or traversing rough terrain, the 4×4 capability ensures confident handling in diverse driving conditions. The AT4 trim means you’re already at the helm of a top-tier configuration known for its off-road readiness. The added AT4 Premium Plus Package, which includes the AT4 Preferred Package, power sunroof, and Technology Package, elevates the standard of luxury and convenience in a pickup truck. The Off-Road High Clearance step, a dealer-installed option, underscores its rugged appeal and practical function. Safety is central; the 3500HD AT4 offers a suite of driver-assist features including Front Collision Warning and Lane Departure Warning, ensuring peace of mind during your journeys. Adventuring outside urban confines doesn’t mean losing touch the vehicle’s onboard WiFi hotspot and navigation system keep you connected and on course. For the trailers and fifth-wheels, the Gooseneck / 5th Wheel Prep Package is pivotal, providing a factory-installed hitch platform and bed-mounted 7-pin trailer harness for immediate towing capability. The high GVWR of 12,100 lbs with single rear wheels confirms its capacity for carrying substantially heavy payloads. Other notable features that enhance the experience include heated and cooled front seats, heated rear seats, a heated steering wheel, Bed Liner, LED Headlights, and an Integrated Tailgate Step for effortless access to the truck bed. Welcome to the new frontier of heavy-duty trucks, where power, prestige, and productivity converge in the 2025 GMC Sierra 3500HD AT4. For further details on this formidable pickup, please refer to Stock # T4337384 . AMVIC-licensed Dealer.