2026 GMC Sierra 3500HD Denali

Vehicle Description

2026 GMC Sierra 3500HD Denali Crew Cab 4WD for Sale in Mobridge, SD

Maximum heavy-duty capability meets flagship luxury in this 2026 GMC Sierra 3500HD Denali Crew Cab 4WD. The Duramax 6.6L Turbo-Diesel V8 pairs with the Allison 10-speed automatic to deliver massive torque for gooseneck and fifth-wheel towing, while the Denali cabin wraps it all in premium leather and the latest technology. Finished in Onyx Black with a Jet Black interior, this one-ton is built for South Dakota and North Dakota ranchers and haulers who refuse to compromise on comfort.

Loaded with the Denali Reserve Package and Max Trailering Package, this Sierra brings a power sunroof, multi-color Head-Up Display, rear camera mirror, GMC MultiPro tailgate, and animated LED lighting together in one of the most capable and refined trucks on the road.

2026 GMC Sierra 3500HD Denali Crew Cab 4WD — Stock #6W138

• Drivetrain: Four-Wheel Drive (4WD) with 2-Speed AutoTrac Transfer Case and Hill Start Assist


• Engine: Duramax 6.6L Turbo-Diesel V8


• Transmission: Allison 10-Speed Automatic


• Exterior Color: Onyx Black


• Interior: Jet Black premium leather


• Packages: Denali Reserve Package and Max Trailering Package


• Towing & Trailering: Max Trailering Package, trailering package with trailer sway control, and vehicle trailering app


• Interior Comfort: 12-way power front bucket seats, heated and ventilated front seats, heated rear outboard seats, 60/40 rear folding bench, and driver seat and mirror memory


• Technology: 13.4-inch diagonal color touchscreen with Google built-in, multi-color Head-Up Display, rear camera mirror, Bose premium audio, 12.3-inch color driver information center, and wireless charging


• Safety: Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, Lane Departure Warning, HD Surround Vision, IntelliBeam, and front and rear park assist


• Exterior Highlights: Power sunroof, animated LED headlamps, power fold/extend and heated trailer mirrors, power rear sliding window, and LED cargo area lighting

Expert Insights

According to Kelley Blue Book and Edmunds, the GMC Sierra 3500HD is praised for its massive Duramax diesel torque, class-leading towing and payload, and quiet, upscale cabin. The Denali trim tops the lineup with premium materials and the most comprehensive technology.

Visit Beadle Chevrolet–GMC in Mobridge, SD

Come see this 2026 GMC Sierra 3500HD Denali 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!