"Elevate your driving experience with this 2026 GMC Sierra 2500HD AT4. Engineered to conquer any terrain, this powerful pickup boasts a Duramax 6.6L V8 Turbodiesel engine that delivers an impressive 470 horsepower and 975 lb-ft of torque, paired with a smooth-shifting 10-speed automatic transmission and capable 4WD system. - 6.6L V8 Diesel Turbocharged (Duramax) (B20-Diesel Compatible) (Includes (K05) Engine Block Heater) (470 hp 350.5 kW @ 2800 rpm, 975 lb-ft of torque 1322 Nm @ 1600 rpm) - 7 Speakers - Bose Premium 7-Speaker Sound System - Premium audio system: Premium GMC Infotainment System - SiriusXM with 360L Trial Subscription - Steering Wheel Audio Controls - Air Conditioning - Automatic temperature control - Front dual zone A/C - 120-Volt Bed Mounted Power Outlet - 120-Volt Instrument Panel Power Outlet - Power driver seat - Remote Vehicle Starter System - Heated / Cooled Leather Seats - Clean Carfax - Local Trade - Non-Smoker - One Owner Elevate your off-road adventures with the AT4's specialized features, including an off-road suspension, 2-speed active transfer case, engine block heater, and more. Inside, you'll enjoy premium comforts like a heated steering wheel, wireless charging, and a 15-inch head-up display. With a Spray-on Bedliner, Trailer Cam Provisions, and Hitch Guidance, this Sierra 2500HD AT4 is ready to handle all your towing and hauling needs. Discover the uncompromising capability and refined luxury of this 2026 GMC Sierra 2500HD AT4. Visit us today and experience the Greg Lair difference for yourself. ""Why buy from Greg Lair GMC"" It's a great question with an even better answer! We've been a local fixture in the Panhandle for nearly 40 years, putting customers from Amarillo and the Panhandle first every single day. We set ourselves apart as the home of the FREE Lifetime Powertrain Warranty on all inventory under 100,000 miles. From our hassle-free buying process to our thorough multi-point inspections by Certified GM Technicians, we make sure your next vehicle is safe, reliable, and ready for the road. Stop by today and see the Greg Lair difference for yourself!"