The 2019 GMC Yukon XL is available as a 4-door, 7-seat sport utility. Starting at $52,400, the 2019 GMC Yukon XL 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 22-mpg on the highway. The top of the line 2019 GMC Yukon XL SLT Standard Edition 4x4, priced at $60,600, is powered by a 5.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 21-mpg on the highway.