The 2007 GMC Yukon XL 2500 is available as a 4-door, 7-seat sport utility. Starting at $39,005, the 2007 GMC Yukon XL 2500 SLE w/3SA 4x2 is powered by a 6.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2007GMCYukon XL 2500Commercial Fleet 4x4 , priced at $ 41,805 , is powered by a 6.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated