This GMC Sierra 2500HD Has Many Features and is well equipped Including, 10-Speed Automatic, 4WD, Obsidian Rush Leather. This 2026 GMC Sierra 2500HD AT4X in Onyx Black features: 2026 GMC Sierra 2500HD AT4X 4WD Duramax 6.6L V8 TurbodieselAll prices plus sales tax, tag, ETF-electronic title fee of $498.00, and dealer service fee of $999.00, which represents cost and profits to the selling dealer for items such as cleaning, inspecting, adjusting vehicles, and preparing documents related to the sale. A Better Way To Buy.BEDLINER, DIESEL, BACK-UP CAMERA, 4X4, LEATHER, HEATED REAR SEATS, HEATED FRONT SEATS, COOLED FRONT SEATS, HEATED STEERING WHEEL, NAVIGATION, LANE DEPARTURE WARNING, BLUETOOTH®, MOONROOF, REAR PARKING AID, MP3 Player, BLIND SPOT MONITORING, KEYLESS ENTRY, SAT RADIO, RUNNING BOARDS, TAILGATE STEP, ALLOY WHEELS.