"SummaryStraight Forward Pricing ** Serving Spartanburg, Greenville, Woodruff, Landrum, Boiling Springs, Inman, Saluda, Gaffney, Blacksburg, Taylors, Simpsonville, Greer, Clemson, Hendersonville, Asheville, Anderson, Brevard, Tryon, Cowpens, Forest City, Shelby, Kings Mountain, Rock Hill and surrounding areas for over 80 Years!Vehicle DetailsReady for demanding jobs and rugged adventures, this 2026 GMC Sierra 3500 AT4 is a capable, refined heavy-duty pickup located in Spartanburg, SC. Powered by a robust V8 6.6L diesel and equipped with 4WD, it delivers the torque and towing confidence needed for hauling trailers, equipment, or recreational gear. The AT4 off-road package enhances capability with upgraded suspension and underbody protection for confident travel on rough terrain.Inside, enjoy premium comfort with leather seats and a heated steering wheel that make long drives more pleasant in any season. Advanced safety and convenience features include adaptive cruise control to help with highway driving and a back-up camera for easier maneuvering and precise trailer hookup. The cabin blends utility and refinement, offering modern controls and durable materials designed for heavy use.This GMC Sierra 3500 AT4 is tailored to buyers who need serious capability without sacrificing comfort and tech. Whether you're managing a worksite, towing a heavy load, or exploring off-road trails, this truck has the features to tackle those demands. Visit our Spartanburg, SC location to inspect this 2026 GMC Sierra 3500 AT4 and take it for a test drive - see how its diesel power and 4WD performance meet your toughest needs.PackagesAT4 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. Black Badging Package: Black Sierra Nameplates; Black GMC Emblems. Off-Road High Clearance Step. Power Sunroof. Body Color Wheel Arch Moldings. Gooseneck/5th Wheel Prep Package. Sterling Metallic. LED Smoked Amber Roof Marker Lamps. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**"