New 2026 GMC Sierra 2500HD AT4X 4WD

The 2026 GMC Sierra 2500HD AT4X is a premium heavy-duty truck built for those who demand capability without compromise.

- Duramax 6.6L V8 Turbodiesel engine with 470 horsepower and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD
- Black Badging Package with black GMC emblems and Sierra nameplates
- Gooseneck/5th Wheel Prep Package for heavy hauling
- Hitch Package with gooseneck ball and chain tiedown kit
- Engine Block Heater and 220-amp alternator
- 2-Speed Active Transfer Case with Hill Descent Control
- Premium Bose 12-speaker audio system with SiriusXM 360L
- HD Surround Vision with bed view camera and trailer camera provisions
- 16-way power driver and passenger seats with heating and ventilation
- Full grain leather seat trim with heated rear seats
- Power moonroof and power sliding rear window
- Spray-on pickup bedliner with GMC logo
- 18" machined aluminum wheels with high gloss black accents
- Apple CarPlay and Android Auto with wireless phone projection

This AT4X arrives finished in striking Onyx Black, presenting an imposing presence both on the road and at the jobsite. The truck combines serious work capability with refined daily-driver comfort. The Duramax diesel engine delivers substantial torque for towing and payload demands, while the advanced suspension and transfer case provide genuine off-road performance when the terrain demands it.

Inside, the cabin reflects the premium positioning of this truck. The leather appointments, power-adjustable front seats with heating and cooling, and heated steering wheel create a commanding yet comfortable driving environment. The multicolor 15-inch head-up display keeps critical information at your sight line, while the surround vision system and trailer camera provisions simplify maneuvering in tight situations.

Modern technology integrates seamlessly throughout the Sierra. The premium infotainment system supports both Apple CarPlay and Android Auto, with wireless charging and multiple USB ports ensuring your devices stay connected. Safety features including automatic emergency braking, lane departure warning, and rear cross traffic alert provide added confidence during daily driving.

The mechanical foundation of this truck speaks to GMC's heavy-duty engineering. The engine block heater ensures reliable cold-weather starts, the 220-amp alternator provides robust electrical capacity, and the gooseneck/5th wheel prep package with hitch platform readies this truck for serious trailering operations. The spray-on bedliner protects the cargo area from the rigors of work use.

"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!