2026 GMC Sierra AT4

Vehicle Details
2026 GMC Sierra 1500 AT4
Exterior: Onyx Black
Interior: Jet Black with Kalahari Accents
Engine: 3.0L Duramax Turbo-Diesel I6
Transmission: 10-Speed Automatic

The 2026 GMC Sierra 1500 AT4 in Onyx Black is built to command attention on and off the road. With its powerful 3.0L Duramax Turbo-Diesel engine, premium off-road suspension, and advanced technology, the Sierra AT4 delivers a perfect balance of rugged performance and refined luxury.

Performance & Mechanical
Engineered for off-road capability and everyday strength, the AT4 features a factory 2-inch lift, monotube shocks, and skid plates for enhanced durability. The Auto Locking Rear Differential, 2-speed Autotrac transfer case, Hill Descent Control, and All-Terrain tires ensure confident handling on any surface. A 120V bed power outlet, Trailer Brake Controller, Trailer Package, and Stabilitrak with Trailer Sway Control make hauling and towing effortless.

Interior & Comfort
Inside, you’ll find a premium, driver-focused cabin with perforated leather seats, 10-way power front buckets, and dual-zone climate control for maximum comfort. The heated and ventilated front seats, heated rear outboard seats, and wrapped heated steering wheel make every drive enjoyable. Additional conveniences include power steering column adjustment, driver seat and mirror memory, 60/40 split-folding rear seats with hidden storage, and premium floor liners for added protection.

Technology & Connectivity
The Sierra AT4 is loaded with intelligent tech, featuring a 13.4" GMC Premium Infotainment touchscreen with Google built-in, wireless Apple CarPlay and Android Auto, and a Bose Premium Sound System for crystal-clear audio. The 12.3" digital driver display, Adaptive Cruise Control, and keyless open with remote start enhance convenience and control. The Technology Package adds a 15" Head-Up Display, Rear Camera Mirror, and Bed View Camera for an elevated driving experience.

Safety & Security
Equipped with GMC Pro Safety, the AT4 includes Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, Lane Keep Assist with Lane Departure Warning, Following Distance Indicator, IntelliBeam Auto High Beams, and the Safety Alert Seat. Additional features like Tire Pressure Monitoring with Tire Fill Alert and Hill Start Assist provide extra peace of mind wherever the road leads.

Exterior Highlights
The bold Onyx Black exterior features LED fog lamps, LED cargo area lighting, a spray-on bedliner, rain-sensing wipers, dual exhaust with premium tips, power-folding heated mirrors, and signature red recovery hooks. The GMC MultiPro Tailgate adds versatility for work or play.

Owner Benefits

3-Year / 36,000-Mile Bumper-to-Bumper Limited Warranty

5-Year / 100,000-Mile Powertrain Limited Warranty

Roadside Assistance & Courtesy Transportation

First Maintenance Visit Included

Why Buy From Country Chevrolet GMC
At Country Chevrolet GMC, we offer a no-pressure, hassle-free experience backed by genuine care and expertise. Each vehicle is hand-selected, thoroughly inspected, and supported by a team dedicated to helping you find the perfect fit. Discover the confidence and capability of the GMC Sierra AT4 with a dealership that puts your satisfaction first.

Equipment
This model has automated speed control that adjusts to maintain a safe following distance, enhancing highway driving convenience. This GMC Sierra is pure luxury with a heated steering wheel. Lane Keep Assist in the vehicle helps maintain safe driving by gently steering to stay within the lane. You'll never again be lost in a crowded city or a country region with the navigation system on the vehicle. The leather seats in the vehicle are a must for buyers looking for comfort, durability, and style. Apple CarPlay: Seamless smartphone integration for this 2026 GMC Sierra 1500 - stay connected and entertained on the go! Start this vehicle from inside with remote start. This vehicle's Lane Departure Warning helps keep you in your lane. The vehicle features a hands-free Bluetooth phone system. Protect the GMC Sierra from unwanted accidents with a cutting edge backup camera system. This unit comes equipped with Android Auto for seamless smartphone integration on the road.

Additional Information
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