The 2012 GMC Yukon XL 1500 is available as a 4-door, 7-seat sport utility. Starting at $43,555, the 2012 GMC Yukon XL 1500 SLE 4x2 is powered by a 5.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 21-mpg on the highway. The top of the line 2012 GMC Yukon XL 1500 Denali 4x2, priced at $57,675, is powered by a 6.2L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 18-mpg on the highway.