2026 GMC SIERRA 1500 AT4X

Vehicle Description

2026 GMC Sierra 1500 AT4 Crew Cab 4WD for Sale in Mobridge, SD

When the roads end and the real work begins, the 2026 GMC Sierra 1500 AT4 Crew Cab 4WD is built to keep going. Powered by the muscular 6.2L EcoTec3 V8 with 420 horsepower and mated to a smooth 10-Speed Automatic, this AT4 delivers serious capability without asking you to sacrifice comfort. Whether you're hauling equipment across the South Dakota prairie or heading out into the backcountry, the Sierra AT4 is the truck that belongs in Mobridge.

This Sierra AT4 arrives loaded with the AT4 Premium Package, Technology Package, and Black Badging Package — a combination that stacks off-road hardware on top of premium tech. The factory-installed 2-inch lift, Rancho® monotube shocks, and Eaton® locking rear differential give it real off-road credentials, while the spray-on bedliner, GMC MultiPro Tailgate, and integrated trailer brake controller make it a working truck through and through. The Technology Package adds a multi-color 15" Head-Up Display and Rear Camera Mirror, keeping key info exactly where you need it without taking your eyes off the trail.

2026 GMC Sierra 1500 AT4 Crew Cab 4WD — Stock #6W27

• Drivetrain: Four-Wheel Drive (4WD) with 2-Speed Autotrac Transfer Case and Eaton® Automatic Locking Rear Differential


• Engine: 6.2L EcoTec3 V8 with 420 horsepower and Active Dual Exhaust with sport-mode capability


• Transmission: 10-Speed Automatic


• Exterior Color: Sterling Metallic


• Interior: Jet Black with Kalahari Accents, Perforated Leather Seating


• Packages: AT4 Premium Package (includes Off-Road High Clearance Steps), Technology Package (Rear Camera Mirror, 15" multicolor Head-Up Display, Bed View Camera), and Black Badging Package


• Off-Road Capability: Factory 2-inch lift, Rancho® monotube shocks, skid plates, Hill Descent Control, and Red vertical recovery hooks


• Towing & Trailering: 8,900 lb towing capacity, Integrated Trailer Brake Controller, Trailering Package with Hitch Guidance, and HD Surround Vision with 2 trailer camera provisions


• Interior Comfort: Heated and ventilated front seats, heated rear outboard seats, heated steering wheel, dual-zone automatic climate control, power sunroof, and 10-way power driver and passenger seats with driver memory


• Technology: 13.4" GMC Premium Infotainment System with Google built-in, wireless Apple CarPlay and Android Auto, SiriusXM with 360L, wireless charging, remote start, and Keyless Open and Start


• Safety: GMC Pro Safety suite — Forward Collision Alert, Automatic Emergency Braking, Lane Keep Assist with Lane Departure Warning, Safety Alert Seat, IntelliBeam, Front and Rear Park Assist, and Rear Cross Traffic Braking


• Exterior Highlights: 20" machined aluminum wheels with Carbon Grey Metallic accents, 275/60R20 all-terrain tires, GMC MultiPro Tailgate with EZ Lift assist, spray-on bedliner, cargo bed LED lighting, and LED fog lamps

Expert Insights

Reviewers at Kelley Blue Book and Edmunds consistently praise the Sierra 1500's premium interior quality, strong V8 performance, and class-leading trailering technology. The AT4 trim strikes the ideal balance between genuine off-road hardware and daily-driver refinement — a combination that resonates with South Dakota drivers who need a truck that handles everything from gravel county roads to highway miles without compromise.

Visit Beadle Chevrolet–GMC in Mobridge, SD

Come see this 2026 GMC Sierra 1500 AT4 Crew Cab 4WD at Beadle Chevrolet–GMC in Mobridge, South Dakota. We serve customers from Aberdeen, SD, Bismarck, ND, and Pierre, SD — all within two hours. Call us at 605-845-7277 or visit beadleautogroup.com to schedule your test drive!