Before you can work on the fuel level sensor, take out the fuel pump module. Push the retaining tab down to remove the fuel pump/fuel level sensor connector from the bottom of the fuel pump module's electrical connector. After that, take out the clip that holds the wire terminal in place and notice where the terminals of the fuel level sensor wires are located. Either use special tool 7812 or an identical one to push the fuel level sensor wire and ground terminals free from the connector. Push the fuel level sensor down with a flathead screwdriver that is inserted underneath it and between the fuel pump module and the fuel level sensor housing. Slide both ends of the fuel level sensor wires through the inside of the fuel pump module, then pull the fuel level sensor out of the installation channel. While installing, put the wires from the fuel level sensor into the bottom of the standpipe and wrap the wires into the groove behind the sensor. As you insert the wires into the standpipe, lift the fuel level sensor up the installation channel and ensure the locking tab hooks onto the standpipe. Then insert the fuel level sensor wires into their connector by pushing them up and pulling them down, ensuring everything is locked in place and the right wires are in position. After that, slide the retaining clip onto the connector, raise the fuel pump/fuel level sensor part up into the fuel pump module's electrical connector and replace the fuel pump module.