The 2025 GMC Sierra 1500 AT4 in Thunderstorm Grey Metallic is a rugged yet refined truck, ready for both on-road and off-road adventures. Its striking Thunderstorm Grey Metallic exterior, complemented by LED headlights, taillights, and fog lights, creates a modern and sophisticated presence. The innovative MultiPro tailgate adds versatility and functionality for work or play, while the 20-inch machined aluminum wheels with carbon grey metallic accents give a distinct and capable look. Inside, the Jet Black/Kalahari interior offers a premium and comfortable environment. A heated steering wheel and heated and ventilated seats provide year-round comfort. The cabin is centered around a 13.4-inch touchscreen infotainment system, providing intuitive access to navigation, entertainment, and vehicle settings. A complementary 12.3-inch touchscreen driver information center displays key vehicle data with clarity and style. Under the hood, a 3.0L Duramax Diesel engine, paired with a smooth and responsive 10-speed automatic transmission, delivers a balance of power, efficiency, and impressive towing capabilities. This combination makes the Sierra 1500 AT4 well-suited for a variety of tasks, from daily commutes to weekend adventures off the beaten path. Safety is a priority, with advanced safety features such as Forward Collision Alert, Front Pedestrian Braking, Following Distance Indicator, and Automatic Emergency Braking providing added peace of mind. The 2025 GMC Sierra 1500 AT4 in Thunderstorm Grey Metallic is more than just a truck; it’s a blend of rugged capability, refined comfort, and advanced technology. Stock Number: TU246857 *AMVIC LICENSED DEALER