2026 GMC Sierra 2500

Meet the 2026 GMC Sierra 2500HD AT4, a crew cab diesel powerhouse finished in crisp white with premium jet black and kalahari leather interior. Built on proven heavy-duty capability with the legendary 6.6L Duramax V8 turbodiesel engine and 10-speed automatic transmission, this 4WD truck delivers commanding performance for work and play alike. The AT4 trim combines rugged off-road credentials with genuine luxury appointments. Key Features: - 6.6L V8 Duramax Turbodiesel Engine with 10-Speed Automatic - 4-Wheel Drive with 2-Speed Active Transfer Case - Heated and Cooled Leather Seats with 10-Way Power Adjusters - Premium GMC Infotainment System with Apple CarPlay/Android Auto - Wireless Phone Projection and Charging - Multicolor 15 Head-Up Display - Trailer Side Blind Zone Alert and Hitch Guidance - HD Surround Vision Camera System - Spray-on Bedliner with Power-Retractable Assist Steps - Advanced Safety Features including Automatic Emergency Braking and Lane Departure Warning This AT4 comes equipped to tackle any challenge while keeping you and your passengers connected and comfortable. The combination of advanced technology, premium materials, and genuine off-road hardware makes this an exceptional choice for discerning truck buyers. Visit us today to experience the capability and refinement this Sierra 2500HD AT4 brings to the road. 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 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!.