Meet the 2025 GMC Sierra 3500HD AT4, a premium heavy-duty truck built for serious work and refined comfort. Silver exterior paired with distinctive Jet Black and Kalahari leather creates a cabin that balances ruggedness with sophistication. This Crew Cab Long Bed is powered by a Duramax 6.6L V8 Turbodiesel engine mated to a 10-speed automatic transmission and 4WD capability, delivering authentic capability for towing, hauling, and off-road adventures. - Power-Retractable Assist Steps with Black finish - Gooseneck/5th Wheel Prep Package - Engine Block Heater - AT4 Premium Plus Package - Bose Premium 7-Speaker Sound System with SiriusXM 360L Trial - Spray-On Pickup Bedliner with GMC Logo - HD Surround Vision with Trailer Camera Provisions - Heated and Ventilated Leather Front Seats - Power Sunroof with Deep-Tinted Glass - Wireless Phone Projection and Charging The AT4 delivers advanced technology and purposeful design throughout. The truck features LED cargo lighting, a multicolor head-up display, and an impressive suite of safety systems including automatic emergency braking, trailer side blind zone alert, and rear cross traffic alert. Off-road credentials include a 2-speed active transfer case, hill descent control, and the X31 Off-Road Package, while premium comfort amenities like heated rear outboard seats and a heated steering wheel ensure driver satisfaction in any season. Experience this capable, well-equipped Sierra at our dealership today and discover why the 3500HD AT4 stands as the premium choice for demanding truck buyers.
