The 2003 GMC Yukon is available as a 4-door, 5-seat sport utility. Starting at $34,910, the 2003 GMC Yukon SLE 4x2 is powered by a 4.8L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 17-mpg on the highway. The top of the line 2003 GMC Yukon SLT 4x4, priced at $37,610, is powered by a 4.8L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 17-mpg on the highway.