4WD. Flex Fuel! My! My! My! What a deal! This 2008 Yukon is for GMC fans looking the world over for that perfect SUV. Awarded Consumer Guide's rating as a 2008 Large SUV Best Buy. While 99% of the time you'll probably be driving on pavement, the 4WD power delivery means you don't have to live that other 1% with regret. Rememeber..... Always drive with Courtesy!