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The 2025 GMC Sierra 3500HD AT4 in Onyx Black is a powerful and rugged heavy-duty pickup, designed to conquer demanding tasks while providing a refined and tech-forward driving experience. Its commanding Onyx Black exterior, accentuated by LED headlights, fog lights, and taillights, 20-inch black aluminum wheels, and power retractable assist steps, projects a bold and capable presence. The AT4 trim enhances its off-road credentials, making it ready for any adventure.   Inside, the Jet Black/Kalahari interior offers a sophisticated and functional environment. Heated and ventilated seats, a heated steering wheel with audio controls, and dual-zone climate control ensure maximum comfort in any weather. The centerpiece is a large 13.4-inch touchscreen infotainment system, providing seamless access to navigation, entertainment, and vehicle settings. A 12.3-inch driver information center keeps essential driving data readily visible, while a premium Bose speaker system delivers an immersive audio experience.   Under the hood, a formidable 6.6L Duramax Diesel engine, paired with a smooth and responsive Allison 10-speed automatic transmission, delivers exceptional torque and towing capabilities. This powertrain provides a seamless blend of raw power and refined performance, making the Sierra 3500HD AT4 a true workhorse.   Safety is paramount, with a comprehensive suite of advanced safety features including Forward Collision Alert, Front Pedestrian Braking, Following Distance Indicator, Front and Rear Parking Assist, Rear Cross Traffic Alert, Rear Cross Traffic Braking, and Rear Pedestrian Alert, all working to enhance driver awareness and help prevent potential hazards. The 2025 GMC Sierra 3500HD AT4 in Onyx Black is a well-equipped and highly capable truck that offers a compelling combination of rugged off-road capability, luxurious comfort, and cutting-edge technology. Stock Number: T4118123 AMVIC LICENSED DEALER

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