2026 GMC Sierra 3500HD SLT

Vehicle Description

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

When the job calls for serious muscle, this 2026 GMC Sierra 3500HD SLT Crew Cab 4WD answers. Built as a dual-rear-wheel (DRW) heavy-duty workhorse, it pairs the legendary Duramax 6.6L Turbo-Diesel V8 with the rugged Allison 10-speed automatic for the kind of towing and payload capability that ranchers, farmers, and contractors across South Dakota depend on. This is a truck engineered to pull heavy and work hard, year after year.

The SLT trim wraps that capability in real comfort, adding heated and ventilated seating, driver memory, a 12.3-inch driver information center, and the Bose premium audio system. With four-wheel drive, a two-speed Autotrac transfer case, and an auto-locking rear differential, this Sierra 3500HD is ready for the worksite, the field, and the long diesel hauls to Bismarck and beyond.

2026 GMC Sierra 3500HD SLT Crew Cab 4WD — Stock #6W88

• Drivetrain: Four-Wheel Drive (4WD) with Dual Rear Wheels (DRW)


• Engine: Duramax 6.6L Turbo-Diesel V8


• Transmission: Allison 10-Speed Automatic


• Exterior Color: Titanium Rush Metallic


• Interior: Dark Walnut/Slate Seating


• Packages: SLT Premium Package, SLT Preferred Package, and SLT Convenience Package


• Capability: Two-Speed Autotrac Transfer Case, Auto-Locking Rear Differential, and 220-Amp Alternator


• Towing & Trailering: Trailering Package, 7-Pin Trailer Harness, In-Vehicle Trailering App, and Bed View Camera


• Comfort: Heated and Ventilated Front Seats, Rear Heated Seats, 10-Way Power Seat Adjusters, Driver Seat & Mirror Memory, Heated Wrapped Steering Wheel, and Dual-Zone Climate Control


• Technology: GMC Premium Infotainment System, 12.3-inch Driver Information Center, Bose Premium Audio, and Wireless Charging


• Safety: Automatic Emergency Braking, Lane Departure Warning, Following Distance Indicator, and Adaptive Cruise Control


• Convenience: Power Sliding Rear Window, CornerStep Rear Bumper, 120-volt Cargo Outlet, and All-Weather Floor Liners

Expert Insights

Reviewers at Kelley Blue Book and Edmunds consistently praise the Sierra HD lineup for its class-leading Duramax/Allison towing capability, comfortable and tech-rich cabin, and confident heavy-duty road manners — strengths the SLT dually puts to work every day.

Visit Beadle Chevrolet–GMC in Mobridge, SD

Come see this 2026 GMC Sierra 3500HD SLT 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!