The gasoline pump is located inside the gas tank. The first thing is to empty the tank, lift the car from the rear, remove the last section of the exhaust tube and pick up the tank.
When you have done all this, at the center of the tank, at the top of it you will find a round piece with a connector, which is the aphorador and the fuel pump forming a single body.
You have to release the shipping and return plastic tubes to the aphorador - fuel pump, release the connector, turn the nut to loosen (to the left) and then pull up the piece.
The truth is that he has enough work.
All the best