GMC's 2007 Yukon series consists of the half-ton Yukon model, the half- and three-quarter-ton Yukon XL, and a Denali in both Yukon and Yukon XL guises. Both two- and four-wheel drive are available on the Yukon and Yukon XL, and the Denali is an all-wheel-drive model.The base 2WD Yukon is powered by a 295-horsepower, 4.8L V8, while a gas and a FlexFuel 5.3L V8 are optional. For more info contact me : [email protected]