2026 GMC Sierra 2500

The 2026 GMC Sierra 2500HD AT4 brings professional-grade capability with refined comfort to every job and journey. This Beige pickup delivers the dependable performance you need with the premium appointments you deserve. - 6.6L Duramax V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque - 10-Speed Automatic transmission with 4WD capability - Duramax B20-Diesel Compatible engine with block heater - Bose Premium 7-Speaker sound system with SiriusXM 360L - Premium GMC Infotainment System with Apple CarPlay and Android Auto - Heated and cooled leather front seats with power adjustments and lumbar support - Multicolor 15 Head-Up Display for enhanced visibility - Bed View Camera with trailer camera provisions and HD Surround Vision - Gooseneck/5th Wheel Prep Package for heavy towing applications - X31 Off-Road Package with Hill Descent Control and enhanced suspension - Advanced safety features including Automatic Emergency Braking and Rear Cross Traffic Alert - Wireless charging and phone projection for seamless connectivity - Power sunroof and power sliding rear window with defogger - 20 High Gloss Black aluminum wheels - Spray-on pickup bedliner with GMC Logo protection The AT4 package combines rugged capability with premium comfort. This truck features an off-road suspension system, high clearance steps, and aggressive exterior styling with the gloss black grille and smoked amber roof marker lamps. The exhaust brake and active transfer case provide additional control during demanding work, while the heated steering wheel and climate-controlled seating ensure driver comfort in any season. Inside, the cabin reflects serious capability meeting luxury. The 10-way power driver seat with lumbar support, split folding rear seat, and heated rear outboard seats accommodate your crew in comfort. The wireless charging pad and dual USB charge ports keep your devices ready for the day ahead. OnStar services, 3 years of connectivity, and the in-vehicle trailering system app put information at your fingertips. Safety extends beyond the basics with this model. Forward pedestrian braking, lane departure warning, rear cross traffic alert, and ultrasonic park assist work together to keep you protected. The trailer side blind zone alert and hitch guidance with hitch view technology make towing simpler and safer. This is a one-owner, clean carfax truck from a non-smoker that has been thoroughly inspected. The Sierra 2500HD AT4 represents a serious investment in capability and comfort. Whether you're managing the demands of professional work or weekend adventures, this diesel powerhouse delivers the torque and refinement expected from GMC's premium heavy-duty line. 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 over 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 invento