SummaryBuy and Drive with Confidence - Devil's Lake Worry Free Guarantee - 3 Day / 300 Mile Return or Exchange, 3 Month / 3,000 mile coverage on powertrain, brakes, bulbs, batteries and tires $0 Deductible.350+ 4.6 STARS POSITIVE REVIEWS ON GOOGLE. See why people from all over the country do business with us! Serving North Dakota for over 100 years! Fast, Easy and Great Vehicles.Looking for the hard to find preowned Longbox Duramax, check out this loaded up 2026 GMC Sierra 3500 AT4 with Turnball. This is a local trade, customer just upgraded trucks. For more information or to schedule a no hassle test drive, give me Dave Brustad a call or text to 701-888-4312 or email dbrustad@devilslakecars.comVehicle DetailsDiscover exceptional capability and premium comfort in this pre-owned 2026 GMC Sierra 3500 AT4, now available in Devils Lake, ND. With just 21,363 miles, this low-mileage heavy-duty pickup is ready to tackle demanding work, weekend adventures, and everything in between. Powered by a V8, 6.6L Diesel engine and equipped with 4WD, this GMC Sierra 3500 AT4 delivers the strength, confidence, and durability drivers expect from a true heavy-duty truck.Built for serious performance, this GMC Sierra 3500 AT4 comes loaded with sought-after features that elevate every drive. Enjoy the comfort of a Heated Steering Wheel, the convenience of Remote Start, and the confidence of Adaptive Cruise Control for smoother highway travel. The Off-Road Package adds rugged capability for challenging terrain, while the BOSE Stereo brings rich, immersive sound to every journey.Inside and out, the GMC Sierra 3500 AT4 blends premium refinement with bold styling and dependable strength. Whether you need a powerful truck for towing, hauling, or daily driving, this diesel 4x4 offers the versatility and capability to handle it all. If you're searching for a pre-owned GMC Sierra 3500 AT4 in Devils Lake, ND, this low-mileage diesel powerhouse deserves a closer look. Experience heavy-duty performance and upscale features in one impressive package today.Installed OptionsAT4 Premium Plus Package: Power Sunroof; Off-Road High Clearance Step,Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Camera Provisions; Electric Rear-Window Defogger; Floor-Mounted Center Console; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Premium Front Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Premium Rear Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Windows with Passenger Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Gloss Black Header and Grille Insert Bars; Rear Wheelhouse Liners,Technology Package: Multicolor 15\" Diagonal Head-Up Display; Auto-Dimming Inside Rearview Mirror with Camera,AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote,Off-Road High Clearance Step,Power Sunroof,Onyx Black,LED Smoked Amber Roof Marker Lamps,Trailering Wiring Provisions,Forward collision mitigation with pedestrian impact prevention,Pedestrian impact prevention,Rear mounted camera,Head-up display,Automatic Emergency Braking predictive brake assist system,Lane departure warning,Rear collision warning,Teen Driver restricted driving mode/alerts,Aerial view camera,Video-feed rearview mirror,Gauge cluster display size: 12.30,Front mounted camera with washer,Right side camera,Pickup box camera,Left side camera,Blind spot warning,Following distance alert,Auto high-beam headlights,Immobilizer,Mobile hotspot internet access,Adaptive cruise control,Cruise control with steering wheel mounted controls,Keyfob remote start,Front wireless smart device charging,Built-in virtual assistant,Keyless Open/Keyless Start with hands-free access and push button start,Keyfob window control,Smart device remote start,Push-button,Weight capacity alert,Full gauge cluster screen,Ventilated driver and front passenger seats,Heated steering wheel,Heated driver and front passenger seats,Heated rear seats,Leather front seat upholstery,Driver seat power reclining, lumbar support, cushion tilt, fore/aft control and height adjustable control,Dual-zone front climate control,Primary monitor touchscreen,Wireless audio streaming,Bose speakers,First-row sliding and tilting glass sunroof with express open/close activation sunshade,Hitch Guidance with Hitch View vehicle to trailer hitching assist,GMC ProGrade Trailering System trailer tire pressure sensors,Trailer light test,Trailer light malfunction warning,Trailer theft alarm,AutoTrac part and full-time 4WD,Duramax 6.6L V-8 diesel direct injection, intercooled turbo, diesel, engine with 470HP,Duramax 6.6L V-8