RV er - I believe on your 2007 the fuel filter is also in the fuel tank with the pump. They switched either in 2004 or 2005. My 2002 is under the driver on the steel line next to the frame. Keep in mind your 2007 might have a 2006 chassis. Dropping the tank can be a problem on a unit that does not run to be able to empty the tank. Probably the best is to create a syphon to another vehicle parked next to the RV. The bottom of the RV tank needs to be higher than the top of the tank on the other vehicle. Then it is merely a matter of supporting the tank on a floor jack, undoing the straps and lowering to the ground.