2026 GMC Sierra 2500HD AT4

Vehicle Description

2026 GMC Sierra 2500HD AT4 Crew Cab 4WD for Sale in Mobridge, SD

Off-road capability meets heavy-duty muscle in this 2026 GMC Sierra 2500HD AT4 Crew Cab 4WD. The 6.6L V8 gas engine pairs with the Allison 10-speed automatic to deliver stout torque and lower up-front cost than diesel, while the AT4 package adds skid plates, all-terrain hardware, and a Traction Select system for real trail ability. Finished in Coastal Dune with a Jet Black and Kalahari interior, this three-quarter-ton is built for South Dakota and North Dakota work and adventure alike.

This AT4 comes ready to tow and wander, with a gooseneck/fifth-wheel package, GMC MultiPro tailgate, spray-on bedliner, and animated LED projector headlamps rounding out a genuinely job-site-ready package.

2026 GMC Sierra 2500HD AT4 Crew Cab 4WD — Stock #6W140

• Drivetrain: Four-Wheel Drive (4WD) with 2-Speed AutoTrac Transfer Case and Traction Select System


• Engine: 6.6L V8 Gas


• Transmission: Allison 10-Speed Automatic


• Exterior Color: Coastal Dune


• Interior: Jet Black with Kalahari accents


• Packages: AT4 Preferred Package, Technology Package, and Gooseneck/5th Wheel Package


• Off-Road & Capability: AT4 skid plates, hill descent control, digital variable steering assist, trailering package, and 3.73 rear axle


• Interior Comfort: Driver seat and mirror memory, dual-zone climate control, and heated seating


• Technology: 12.3-inch color driver information center, rear camera mirror, wireless Android Auto and Apple CarPlay, HD Surround Vision, and SiriusXM


• Towing & Utility: Gooseneck/fifth-wheel prep, 7-pin trailer harness, spray-on bedliner, power fold/extend and heated trailer mirrors, and GMC MultiPro tailgate


• Exterior Highlights: Animated LED projector headlamps, LED roof marker lamps, and rear-window defogger

Expert Insights

According to Kelley Blue Book and Edmunds, the GMC Sierra 2500HD is praised for its strong towing, durable powertrains, and comfortable cabin. The AT4 trim adds genuine off-road hardware and rugged styling, and the 6.6L gas V8 is a favorite for buyers who want big-block torque without the diesel premium.

Visit Beadle Chevrolet–GMC in Mobridge, SD

Come see this 2026 GMC Sierra 2500HD 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!