2026 GMC Sierra 2500HD AT4

From the store

Call us at 512-954-9290

This 2026 GMC Sierra 2500HD AT4 in pristine white delivers commanding capability and refined comfort for the discerning truck buyer. Backed by the legendary Duramax 6.6L V8 Turbodiesel engine producing 470 horsepower and 975 lb-ft of torque, paired with a 10-speed automatic transmission and 4WD, this truck stands ready to handle any task with authority and confidence.

- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque

- 10-Speed Automatic transmission with 4WD

- AT4 Premium Plus Package with power sunroof

- Gooseneck/5th Wheel Prep Package with hitch platform

- Technology Package with wireless phone projection and carplay/Android Auto

- Multicolor 15" Head-Up Display

- HD Surround Vision with bed view camera and trailer provisions

- Bose Premium 7-Speaker Sound System with SiriusXM

- Heated and ventilated front seats with heated steering wheel

- Off-Road Suspension with 2-Speed Active Transfer Case

- Ultrasonic front and rear park assist with trailer side blind zone alert

- Hill Descent Control and terrain management systems

- Wireless charging and dual USB charging ports

- Premium leather-appointed seating with 10-way power adjusters

The AT4 Premium Plus Package elevates this hauler with genuine off-road DNA. The X31 Off-Road Package, combined with the 2-Speed Active Transfer Case and Hill Descent Control, ensures confident performance across challenging terrain. The Gooseneck/5th Wheel Prep Package—complete with hitch platform and 7-pin trailer harness—positions this truck as the ultimate towing and hauling solution for serious professionals and enthusiasts alike.

Interior sophistication meets practical engineering throughout the cabin. Heated and ventilated leather front seats, a heated steering wheel, and automatic dual-zone climate control create an environment of comfort during long drives. The power sunroof, wireless phone projection, and Bose premium audio system with SiriusXM transform every journey. Ultrasonic park assist, rear cross traffic alert, and the trailing side blind zone alert provide confidence in tight quarters, while the multicolor Head-Up Display keeps critical information at eye level.

Connectivity and convenience define modern truck ownership. OnStar emergency communication services, remote vehicle starter, keyless open and start, and universal home remote integration put control at your fingertips. The in-vehicle trailering system app simplifies towing operations, while multiple USB ports and 120-volt power outlets ensure your devices stay charged and ready for work or recreation.

Built with meticulous attention to detail, this Sierra 2500HD features GMC MultiPro Tailgate Step Lights, body-color wheel arch moldings, black badging throughout, and a spray-on pickup bedliner with GMC logo. The 20-inch high-gloss black aluminum wheels enhance the commanding stance, while LED cargo area lighting and smoked amber roof marker lamps add refined touches.

Call us at 512-954-9290 Price includes: $2000 - GMC Bonus Cash. Exp. 11/30/2026 $2500 - Buick & GMC Consumer Cash Program. Exp. 11/30/2026