New 2026 GMC Sierra 3500HD SLT 4WD

This 2026 GMC Sierra 3500HD SLT represents serious capability paired with refined comfort for those who demand both power and sophistication in their heavy-duty truck.

- 6.6L V8 Duramax Turbodiesel engine with 470 horsepower and 975 lb-ft of torque
- B20-Diesel compatible with engine block heater included
- 10-Speed Automatic transmission with 4WD
- Heated and cooled leather seats with 10-way power adjustments and lumbar support
- GMC Premium 13.4" diagonal information display with wireless phone projection
- Premium Bose 7-speaker audio system with SiriusXM 360L trial subscription
- Automatic Emergency Braking with Forward Collision Alert and Lane Departure Warning
- Heated steering wheel and auto-dimming mirrors
- 2-Speed Active Transfer Case with Exhaust Brake
- Hitch Guidance with Hitch View camera system
- Remote Vehicle Starter System with keyless open and start
- Exterior parking camera with rear view
- 120-volt bed and instrument panel power outlets
- Wireless charging and multiple USB ports throughout
- Chrome surround grille with winter grille cover

This truck arrives as a local trade-in from a single owner, and our Carfax report confirms its non-smoking history and clean maintenance record. The SLT package combined with the Suspension Package creates a vehicle that handles demanding work while delivering a composed ride on highway miles. The cab interior reflects GMC's attention to detail—from the heated and ventilated seating to the intuitive 13.4-inch display that keeps you informed and connected. Whether you're towing, hauling, or simply commanding the road, the engineering beneath this white exterior was built to last.

The Duramax diesel engine is paired with a robust 10-speed transmission designed to optimize efficiency across varied driving conditions. Active transfer case technology and the exhaust brake work together to give you precise control whether you're ascending grades or managing challenging terrain. The suspension package elevates comfort and stability, making this truck as suitable for highway cruising as it is for jobsite demands.

Standard safety features include dual front airbags, dual front side impact airbags, and overhead airbags for comprehensive protection. Electronic Stability Control, traction control, and brake assist are engineered into every drive. The automatic emergency braking system and forward collision alert provide an additional layer of awareness, while lane departure warning helps keep you centered on course.

Inside, you'll find that GMC hasn't compromised on the details—driver memory for the power seat, a heated steering wheel for winter mornings, auto-dimming door mirrors, and intelligent lighting systems like rain-sensing wipers and IntelliBeam automatic high beams. The center console includes lockable storage, and the split-folding rear seats provide flexibility for cargo or passengers.

"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!