This 2026 GMC Sierra 2500HD AT4 is proudly offered by Legacy Buick GMC This GMC includes: GOOSENECK / 5TH WHEEL PREP PACKAGE LPO, HARD FOLDING TRUCK BED COVER BY REALTRUCK ADVANTAGE Pickup Bed Tonneau Cover ALTERNATORS, DUAL, 220-AMPS PRIMARY, 170-AMPS AUXILIARY TRANSMISSION, 10-SPEED AUTOMATIC A/T 10-Speed A/T GVWR, 11,350 LBS ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE Diesel Fuel 8 Cylinder Engine Turbocharged AT4 PREMIUM PLUS PACKAGE Generic Sun/Moonroof Sun/Moonroof Running Boards/Side Steps TIRES, LT275/65R20 Tires - Rear On/Off Road Tires - Front On/Off Road LPO, BODY COLOR WHEEL ARCH MOLDINGS *Note - For third party subscriptions or services, please contact the dealer for more information.* There's a level of quality and refinement in this GMC Sierra 2500HD AT4 that you won't find in your average vehicle. With 4WD, you can take this 2026 GMC Sierra 2500HD AT4 to places roads don't go. It's all about the adventure and getting the most enjoyment out of your new ride. You can finally stop searching... You've found the one you've been looking for. Dealer Disclosure: Prices do not include state and local tax, title, license, notarial fees, convenience fees, documentary fees, and any finance charges. All prices, specifications and availability subject to change without notice. Contact dealer for most current information .Not available with special finance, lease and some other offers.