Best Offer Available2020 GMC Sierra 3500HD Denali Dually Loaded Leather Heated & Cooled SeatsTop Line 3500HD Denali Dually Loaded Leather Heated & Cooled TruckExterior:Carbon Black MetallicEngine:Duramax 6.6L Biodiesel Turbo V8 445hp 910ft. lbs.Interior:Jet Black Transmission:Allison 10-Speed Shiftable Wheel Drive Additional Photos* * * Click Phot...