GM 19207814
Fuel Gauge Sending Unit

Start by sanitizing the fuel pipe attachments and hose fittings and nearby regions before commencing the Fuel Level Sensor replacement operation. The first step requires removing the Fuel Tank before disconnecting the evaporative emission (EVAP) line quick connect fittings between the module and vent valve. Besides this disconnecting step comes removal of the evap line from the Fuel Tank side clip and disassembly of its retention features. To begin remove the fuel feed line quick connect fitting from the module then remove it from its retaining feature which is molded into the Fuel Tank. The j 45722 (Fuel Sender Lock Ring Tool) needs installation onto the Fuel Pump module lock ring while also protecting the lock ring from damage and maintaining both hands away from the fuel pipes. The technician should use the j 45722 tool and breaker-bar to rotate the lock ring counterclockwise until it unlocks before removing the tool to raise the module from the tank. Tipping the module will allow clearance for the sensor arm and float. Remove and throw away the old Fuel Pump module seal before draining the fuel into an authorized container. Checking the sealing surface of the Fuel Pump module remains a necessary step before examining the lock ring for any signs of damage or estimating warpage beyond 0.41 mm (0.016 in). If such warpage is detected, a new lock ring needs to be installed. Installation requires cleaning the male port on the Fuel Pump module while applying new Fuel Tank module seal on the Fuel Tank before inserting the module making sure the sensor arm and float do not obstruct the opening. Begin by placing the module in position and setting the tang to fit the notch of the Fuel Tank before installing the lock ring. With the j 45722 turn the lock ring clockwise and fasten it before joining the fuel feed line quick connect to the module tank retention feature. The evap line quick connect fittings must be applied to the module and vent valve while fitting into the tank retaining features before placing them onto the Fuel Tank clip on the side wall.