"Elevate your driving experience with the 2026 GMC Sierra 2500HD AT4. This powerful and capable pickup is engineered to conquer any terrain, delivering exceptional performance and uncompromising utility. - Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque - 10-speed automatic transmission with 4WD - Off-road suspension and 2-speed active transfer case for enhanced capability - Spray-on bedliner, power-retractable assist steps, and more Discover the unparalleled versatility of the Sierra 2500HD AT4. This truck is equipped with an impressive array of features: - Bose premium 7-speaker sound system - Heated and ventilated leather-appointed front seats - Multicolor 15"" head-up display - Wireless charging and phone projection - Surround vision camera system - Trailering tech including Hitch Guidance and Trailer Side Blind Zone Alert Whether hauling heavy loads or conquering the great outdoors, the 2026 GMC Sierra 2500HD AT4 is the ultimate partner for your adventures. Experience the difference at Greg Lair GMC today. ""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!"