The 2016 GMC Yukon XL is available as a 4-door, 7-seat sport utility. Starting at $51,015, the 2016 GMC Yukon XL SLE 4x2 is powered by a 5.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway. The top of the line 2016 GMC Yukon XL Denali 4x4, priced at $71,025, 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 20-mpg on the highway.