This 2015 GMC Sierra 2500HD Denali is a powerful and reliable 4x4 with a 6.6 liter Duramax Diesel Turbo V8 397hp 765 lb-ft engine and common rail direct injection. It has driven 105,485 miles and comes with a crash test rating of 4 out of 5 stars. It features a black... via EveryCarListed.com