2026 GMC Sierra 2500HD AT4

From the store

Call us at 512-954-9290

The 2026 GMC Sierra 2500HD AT4 presents a commanding presence on any road or worksite. This white turbodiesel truck combines serious capability with refined comfort, designed for those who demand both performance and sophistication.

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

- 10-Speed Automatic transmission with 4WD capability

- AT4 Premium Plus Package with power sunroof

- Gooseneck/5th Wheel Prep Package with hitch platform and bed-mounted 7-pin trailer harness

- X31 Off-Road Package featuring off-road suspension and 2-speed active transfer case

- Bed View Camera with trailer camera provisions and trailer side blind zone alert

- Advanced safety features including HD Surround Vision, rear cross traffic alert, and ultrasonic front and rear park assist

- Premium 7-speaker Bose sound system with SiriusXM 360L trial subscription (3 years included)

- Multicolor 15-inch Head-Up Display with wireless phone projection

- Black GMC badging package, LED lighting, and gloss black grille

- Heated and ventilated front seats with 10-way power adjusters and lumbar support

- Spray-on pickup bedliner with GMC logo

- Front and rear all-weather floor liners with AT4 logos

- Upfitter Switch Kit (5) with configurable circuits for aftermarket accessories

- Remote vehicle starter system, push button start, and keyless entry

- Hill Descent Control and automatic emergency braking

The AT4 designation signals purposeful engineering, and this truck proves it with every detail. The turbodiesel engine delivers substantial torque whether you're towing, hauling, or navigating challenging terrain. The 10-speed automatic transmission ensures smooth power delivery across all driving conditions. Off-road suspension and active transfer case technology provide genuine capability when the pavement ends.

Inside, the Sierra 2500HD AT4 respects your time and comfort. Premium leather-appointed seating with heating and ventilation, coupled with the Bose premium sound system, transforms long drives into pleasant experiences. Multiple power outlets, including 120-volt options in both the bed and instrument panel, keep your equipment charged and ready. The wireless charging pad and wireless phone projection integrate your devices seamlessly into the cabin.

Technology enhances both safety and convenience throughout this truck. The multicolor 15-inch Head-Up Display keeps critical information in your line of sight. The bed view camera with trailer provisions simplifies maneuvering, while trailer side blind zone alert adds another layer of awareness. Front rain-sensing wipers and automatic high-beam headlights respond to conditions without your intervention.

For serious work, the gooseneck and 5th wheel prep package provides the foundation for heavy-duty towing operations. The hitch platform, stamped bed holes, and 7-pin trailer harness come ready for professional upfitting. The five-circuit upfitter switch kit accommodates aftermarket electrical systems, whether for work equipment or specialized accessories.

With its white exterior, premium black badging package, and commanding presence, this 2026 Sierra 2500HD AT4 makes a statement while delivering the reliability and capability a professional demands. The combination of modern technology, comfort appointments, and genuine work-ready engineering creates a truck that performs equally well in the boardroom or the backcountry.

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