This 2015 GMC Sierra 1500 Denali 4x4 is a powerful and reliable motorcar. It has a 6.2 liter EcoTec3 V8 420hp 460 lb-ft engine, direct injection, and a white diamond tricoat exterior. It has driven 142,780 miles and has a fuel economy of 15 mpg in the city and 21 mpg on... via EveryCarListed.com