This 2026 GMC Sierra 2500HD AT4 is a rugged and capable pickup that's ready to take on any challenge. Powered by a Duramax 6.6L V8 Turbodiesel engine mated to a 10-speed automatic transmission, this Sierra 2500HD AT4 delivers impressive power and power.- 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)- 3 Years SiriusXM- Bose Premium 7-Speaker Sound System- Premium audio system: Premium GMC Infotainment System- Heated / Cooled Leather Seats- Local Trade- Non-Smoker- One Owner- Clean Carfax- Off-Road Suspension- 2-Speed Active Transfer Case- 220-Amp Alternator- Engine Block Heater- Exhaust Brake- Heavy-Duty 80 Amp Battery- High Idle Switch- Off-Road High Clearance Step- Power-Retractable Black Assist Steps- Spray-on Pickup Bedliner with GMC Logo- Winter Grille Cover- Multicolor 15 Diagonal Head-Up Display- Wireless Charging- Wireless Phone Projection- AT4 Preferred Package- AT4 Premium Plus Package- Gooseneck/5th Wheel Prep Package- Hitch Package- Preferred Equipment Group 4SB- Technology Package- X31 Off-Road PackageThis Sierra 2500HD AT4 is packed with premium features and capabilities that make it the ultimate off-road companion. From the rugged off-road suspension to the advanced trailering tech, this truck is ready to tackle any terrain or towing task with confidence.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 Coverage on all stock 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 ride is safe, reliable, and ready for the road. Stop by today and see the Greg Lair difference for yourself!

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2026 GMC Sierra 2500 HD

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