The 2007 GMC Yukon is a full-size, four-door SUV available with two-, four-, or all-wheel drive. Power comes from a variety of V8 engines and three rows of seats can accommodate between six and nine passengers. Variations of the Yukon include the upscale Denali and the longer XL model, while Chevrolet and Cadillac offer their own unique versions called the Tahoe and Escalade.