I have a 2000 EXPY 4.6 4x2 with the sport package w/o load leveling suspension. It has a 30 gallon tank. Why? I don't know but I like it. According to the 2000 manual all 4x4's and 4x2's with load leveling suspension should have the 30 gallon tank. I see no reason why a 30 gallon tank won't fit. The manual also states the correct way to fuel your EXPY is to let the automatic shutoff click off three times before your finished fueling. That's how I found out mine has the 30 gallon tank. First click 24gls etc.. Hope that helped