About This GMC Sierra 2500HD AT4X

The 2024 GMC Sierra 2500HD AT4X Crew Cab is finished in Summit White with an Obsidian Rush leather interior and equipped with a four-wheel-drive system. Built as a heavy-duty off-road-oriented truck, it combines diesel power with premium features and enhanced capability.
Power comes from a 6.6-liter Duramax turbodiesel V8 paired with an Allison 10-speed automatic transmission, a dual-range transfer case, and an electronic locking rear differential. This setup delivers substantial torque and reliable performance for towing, hauling, and off-road use.
The exterior features 18-inch wheels and equipment from the AT4X package, emphasizing durability and off-road readiness. The Gooseneck/Fifth Wheel Prep Package adds towing versatility, while a sunroof enhances everyday comfort.
Inside, the cabin is trimmed in Obsidian Rush leather with heated seating and ventilated front seats, offering a refined environment within a heavy-duty platform.
Technology includes a Bose premium audio system and modern infotainment features, providing connectivity and convenience.
The 2024 GMC Sierra 2500HD delivers a strong combination of Duramax diesel performance, off-road capability, and upscale interior features, making it a versatile and well-equipped heavy-duty truck.