Dealer-supplied vehicle comments. Request current pricing and purchase terms in writing from the dealership.
Meet the 2026 GMC Sierra 1500 AT4, a powerful diesel-powered crew cab built for capability and comfort.
This silver Crew Cab Short Box delivers impressive efficiency with its 3.0L I6 diesel engine achieving 22 city and 26 highway MPG, paired with smooth 10-Speed Automatic transmission and confident 4WD performance.
Wrapped in premium Jet Black leather with Kalahari accents, the interior reflects the refined AT4 experience while maintaining tough-truck practicality.
- Power Sunroof with Sunroof S
unshade
- Premium Bose 7-Speaker Sound System with SiriusXM 360L Trial
- Technology Package and AT4 Premium Package
- Heated and Ventilated Leather-Trimmed Seats with Power Adjusters
- Off-Road Suspension with Auto-Locking Rear Differential and Hill Descent Control
- Multicolor 15" Head-Up Display with Rear Camera Mirror and Surround Vision
- Trailering Package: Integrated Trailer Brake Controller, Hitch Guidance, and Trailer Camera
- Remote Vehicle Starter with Keyless Open and Start
- Wireless Charging and Multiple USB Ports Throughout Cabin
- 20" Machined Aluminum Wheels with Spray-On Bedliner
This AT4 combines advanced technology with off-road capability, featuring an integrated trailering system app, ultrasonic parking assist, and lane keep assist with departure warning.
The heavy-duty construction includes an engine block heater, rear wheelhouse liners, and off-road high-clearance steps—all designed for durability and performance.
Come experience the Sierra 1500 AT4's commanding presence and refined capability in person today.