2026 GMC Sierra 2500HD AT4

From the store

Call us at 512-954-9290

- 6.6L V8 Diesel Turbocharged Duramax Engine with 470 hp and 975 lb-ft of torque

- 10-Speed Automatic Transmission with 4WD

- AT4 Preferred Package and AT4 Premium Plus Package

- X31 Off-Road Package with Off-Road Suspension and 2-Speed Active Transfer Case

- Gooseneck/5th Wheel Prep Package

- Technology Package with Wireless Phone Projection and Wireless Charging

- Multicolor 15" Head-Up Display

- HD Surround Vision with Bed View Camera and Trailer Camera Provisions

- Bose Premium 7-Speaker Sound System with SiriusXM and 3 Years Complimentary Service

- Heated and Ventilated Front Seats with 10-Way Power Adjustment

- Power Sunroof with Deep-Tinted Glass

- Spray-on Pickup Bedliner with GMC Logo

- 20" High Gloss Black 8-Spoke Aluminum Wheels

- Black Badging Package with Gloss Black Header Grille

- Remote Vehicle Starter System with Push Button Start

The 2026 GMC Sierra 2500HD AT4 is engineered for those who demand capability without compromise. This White truck arrives fresh and ready to perform, featuring the legendary Duramax 6.6L V8 turbocharged diesel engine that delivers 470 horsepower and an impressive 975 lb-ft of torque. The 10-speed automatic transmission paired with 4WD delivers refined power delivery whether you're navigating city streets or tackling challenging terrain.

AT4 badging signals serious off-road intent, and this truck backs it up with the X31 Off-Road Package. You'll find an off-road suspension tuned for uneven ground, a 2-speed active transfer case for low-range capability, and hill descent control to manage steep descents with confidence. The Gooseneck/5th Wheel Prep Package makes heavy towing straightforward, while the comprehensive trailering system with bed view camera and trailer viewing software keeps your hauling operation under control.

Inside, the cabin reflects the quality GMC owners expect. Heated and ventilated front seats with 10-way power adjustment ensure comfort during long drives. The Bose premium audio system delivers rich sound through seven speakers, enhanced by SiriusXM with three years of complimentary service. Wireless phone projection and wireless charging keep your devices connected and powered throughout the day. The multicolor 15-inch head-up display puts critical information directly in your line of sight.

Technology works in your favor with this truck's comprehensive suite of driver-assistance features. HD surround vision, rear cross traffic alert, trailer side blind zone alert, and ultrasonic park assist combine to give you complete awareness around the vehicle. The inside rearview auto-dimming camera mirror and rain-sensing wipers adapt to conditions automatically. Push button start and keyless open add convenience to daily operation.

The AT4 exterior styling leaves no doubt about this truck's character. Black GMC emblems, black Sierra nameplates, and a gloss black header grille create a cohesive, purposeful appearance. The 20-inch high gloss black aluminum wheels fill the wheel wells properly, while LED cargo area lighting and LED smoked amber roof marker lamps add functional styling. A spray-on bedliner protects the cargo box while bearing the GMC logo with pride.

Every mile behind the wheel of this Sierra 2500HD AT4 reinforces why this truck sets the standard in its class. The combination of diesel efficiency, advanced capability, refined comfort, and thoughtful technology makes ownership truly rewarding. Come see what modern truck excellence looks like and experience the difference a fully equipped Sierra 2500HD can make.

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