Buick 13510671 Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Sensor)

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Use a pair of large water pump pliers and turn it counterclockwise. If it's tight, use a hammer and a brass punch to loosen it.

To check the fuel pump operation, you can listen for the brief sound it makes when the ignition key is turned to the ON position, pressurizing the fuel system before starting the engine.

Start by removing the oil filler cap and engine cover fasteners. Lift the engine cover and valve cover insulator off of the valve cover and reinstall the oil filler cap. Relieve the fuel system pressure and disconnect the cable from the negative battery remote terminal. Disconnect the fuel pressure sensor electrical connector and unscrew and remove the sensor from the fuel rail. Clean the threads in the fuel rail and apply a drop of oil on the new sensor threads before installing it. Remove the sensor again, apply another drop of clean engine oil on the threads, and reinstall it. Connect the sensor electrical connector and reverse the removal process.