The 2025 GMC Sierra 2500HD 4WD Crew Cab 159" AT4, finished in the bold Onyx Black, represents the pinnacle of heavy-duty luxury and performance. It is powered by the robust Duramax 6.6L Turbo-Diesel V8 engine, delivering unparalleled towing and hauling capabilities, all while being B20-diesel compatible for optimal efficiency and reduced emissions. Inside, the cabin showcases the elegant Jet Black interior, complemented by striking Kalahari accents that exude a sophisticated atmosphere. The AT4 Preferred Package enhances this luxurious space with state-of-the-art features, ensuring every journey is both comfortable and stylish.The Four Wheel Drive system of the Sierra 2500HD AT4 seamlessly adapts to any terrain, providing supreme confidence and control. Additionally, the Technology Package offers cutting-edge connectivity and safety features, ensuring every drive is both smart and secure. For those who enjoy the open road, the power sunroof invites natural light into the cabin and enhances the driving experience. The 2025 GMC Sierra 2500HD AT4 is the perfect combination of rugged capability and refined comfort, making it an ideal choice for those who expect more from their truck.