I need to change out the fuel pump on my 2000 Jeep Grand Cherokee Laredo 2 wheel drive. All the professionals I call, and all the manuals are saying that in this particular vehicle, the fuel pump is located insides the fuel tank. But when I look under the car and start it up, there is a small cylinder object located outside in front of the fuel tank making a whirring sound for a minute like it has a motor in it. And it is in the proper position to be the fuel pump. I want to be able to replace this part without having to spend the $400 that everyone wants to charge me. Can anyone tell me what to do or make of this?
Has anyone run across this problem before?