Hi . I asume that you are talking about the resevoir tank for the 4 power levelers. On my 2005, the tank is located in front of the engine on the driver's side. It is about 12 to 15 inches high and 7 to 8 in in diameter.
I do recall reading somewhere that the tank in the older models was located behind the rear wheels on the driver's side. be patient. I'm sure someone who has your model year will have the correct answer in a day or two. This is a busy weekend for alot of folks.