Introducing the 2025 GMC Sierra 3500HD Crew Cab Standard Box AT4, a truck that combines rugged performance with luxurious amenities. Finished in a commanding Onyx Black paint, the Sierra 3500HD features a sophisticated Jet Black & Kalahari Accent interior, making a bold statement both inside and out. At its core, the Sierra 3500HD is powered by a formidable 6.6L Duramax Turbo-Diesel engine, mated to a 10-speed automatic transmission for seamless power delivery and exceptional towing capabilities. Whether you’re hauling heavy loads or navigating tough terrain, this powertrain is designed to handle it all with ease. The AT4 trim is equipped with a comprehensive trailering package that includes hitch view, trailer side blind zone alert, and a trailer brake controller to enhance towing safety and convenience. Additional safety features include rear cross traffic alert, HD surround vision, front and rear park assist, automatic emergency braking, forward collision alert, front pedestrian braking, and lane departure warning, ensuring you have a full suite of technologies to assist in various driving conditions. Inside, the Sierra 3500HD offers a host of premium features designed to provide maximum comfort and connectivity. The cabin is fitted with a 13.4 touchscreen featuring navigation, Bluetooth, Wireless Apple CarPlay, and Android Auto, keeping you seamlessly connected and entertained. The adaptive cruise control and heads-up display add to the high-tech experience, while wireless charging ensures your devices remain powered up. Comfort is paramount with heated and ventilated front seats, heated second-row seating, and a heated steering wheel, making every journey enjoyable regardless of the weather. The power sunroof, rear camera mirror, power sliding rear window, and 20 Black Aluminum wheels enhance both functionality and style. Rain-sensing wipers and the GMC Multipro Tailgate offer added convenience, while the power retractable assist steps ensure easy access to the truck’s cabin. Stock Number: T4128167 *AMVIC Licensed Dealer