2026 GMC Sierra 3500 HD AT4



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  • $93,420 FINAL PRICE

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Vehicle Information

VIN: 1GT4UVEY7TF280602
Stock #: 260550
Model Code: TK30943
  • Condition New
  • Body Style Crew Cab
  • Exterior Color Onyx Black
  • Interior Color Jet Black With Kalahari Accents, Perforated Front Leather Seating Surfaces
  • Engine 6.6L Duramax Turbo-Diesel V8 engine
  • Transmission Automatic
  • Fuel Type Diesel Fuel

Highlighted Features

Feature availability subject to final vehicle configuration. Please reference window sticker for more info.

Dealer Comments

Vehicle Details
Discover rugged capability and refined comfort with this 2026 GMC Sierra 3500 AT4 4WD, now available in Stephenville, TX. Powered by a potent V8 6.6L Duramax diesel, this heavy-duty pickup is engineered for towing, hauling, and tackling demanding jobs with confidence. The AT4 trim blends off-road prowess with upscale appointments, highlighted by a dedicated Off-Road Package that includes enhanced suspension, skid protection, and terrain-optimized features to help you conquer rough trails and remote work sites. Inside, premium materials and thoughtful technology create a commanding yet comfortable cabin. Enjoy crystal-clear audio via the BOSE stereo system and the convenience of Remote Start for effortless climate control before you step inside. Stay secure and aware with an integrated Back-Up Camera that simplifies maneuvering and hitching heavy loads. The Heated Steering Wheel adds extra comfort during cooler mornings on the job or weekend outings. This GMC Sierra 3500 AT4 is tailored for drivers who demand strength and sophistication from a heavy-duty truck. With robust towing capacity, off-road-ready hardware, and a suite of convenience and safety technologies, it's ready for both professional work and weekend adventures. Visit Stephenville, TX to experience the capability and comfort of this exceptional 2026 GMC Sierra 3500 AT4 in person.

Equipment
This GMC Sierra features steering wheel audio controls. Engulf yourself with the crystal clear sound of a BOSE sound system in the GMC Sierra. This unit has automated speed control that adjusts to maintain a safe following distance, enhancing highway driving convenience. This 1 ton pickup's Lane Departure Warning keeps you safe by alerting you when you drift from your lane. It is pure luxury with a heated steering wheel. Never get into a cold vehicle again with the remote start feature on the vehicle. See what's behind you with the back up camera on the vehicle. An off-road package is installed on the GMC Sierra so you are ready for your four-wheeling best. The leather seats in this model are a must for buyers looking for comfort, durability, and style. The GMC Sierra is equipped with the latest generation of XM/Sirius Radio. The GMC Sierra has a V8, 6.6L high output engine.

Packages
AT4 Premium Plus Package: Power Sunroof. 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 Vis

All Features

AT4 Premium Plus Package

    LPO, Black Badging Package

      Gooseneck / 5th Wheel Prep Package

        LPO, Hitch Package


          • DriveType
            • DriveType: Four Wheel Drive
          • Fuel Economy
            • City: 0 MPG
            • Hwy: 0 MPG
            • Combined: 0 MPG
          • Fuel System
            • Fuel System: Direct Injection
          • Fuel Tank Capacity
            • Fuel Tank Capacity: 36 gal
          • Fuel Type
            • Fuel Type: Diesel Fuel
          • Horse Power
            • Horse Power: 470
          • Rear Wheel
            • Rear Wheel: Single
          • Trailering Capacity
            • Trailering Capacity: 20000 lbs

          Warranty

          • Corrosion: 3 Years/36,000 Miles Rust-Through 6 Years/100,000 Miles
          • Roadside Assistance: 5 Years/60,000 Miles 3.0L & 6.0L Duramax® Turbo-Diesel Engines, And Certain Commercial, Government, And Qualified Fleet Vehicles: 5 Years/100,000 Miles
          • Drivetrain: 5 Years/60,000 Miles 3.0L & 6.0L Duramax® Turbo-Diesel Engines, And Certain Commercial, Government, And Qualified Fleet Vehicles: 5 Years/100,000 Miles
          • Warranty: <<< Preliminary 2026 Warranty >>>
          • Basic: 3 Years/36,000 Miles
          • Maintenance: First Visit: 12 Months/12,000 Miles
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          May not represent actual vehicle. (Options, colors, trim and body style may vary)