Tools Required

1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
2. Remove the retainer from the fuel feed line to engine quick-connect fitting.



3. If equipped with the 5.3L (L59) engine, remove the retainers from the fuel feed and return line to engine quick-connect fittings.




Caution: Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury.

4. Using compressed air, blow any dirt or debris from around the fitting.



5. Using the correct tool from J 41769 , insert the tool into the female connector, then push inward in order to release the quick connect locking tabs.
6. If the vehicle is a cab/chassis, it may be necessary to use J 43178 in order to release the quick connect locking tabs.



7. Pull the fuel line connection apart.

Notice: If necessary, remove rust or burrs from the fuel pipes with an emery cloth. Use a radial motion with the fuel pipe end in order to prevent damage to the O-ring sealing surface. Use a clean shop towel in order to wipe off the male tube ends. Inspect all the connections for dirt and burrs. Clean or replace the components and assemblies as required.

8. Use a clean shop towel in order to wipe off the male connection end.
9. Inspect both ends of the fitting for dirt and burrs. Clean or replace the components as required.

Caution: In order to reduce the risk of fire and personal injury, before connecting fuel pipe fittings, always apply a few drops of clean engine oil to the male pipe ends.

This will ensure proper reconnection and prevent a possible fuel leak.
During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.
1. Apply a few drops of clean engine oil to the male connection end.



2. Push both sides of the fittings together in order to snap the retaining tabs into place.



3. Once installed, pull on both sides of the connection in order to make sure the connection is secure.



4. If equipped with the 5.3L (L59) engine, install the retainers to the fuel feed and return line to engine quick-connect fittings.



5. Install the retainer to the fuel feed line quick-connect fitting.
6. Install the fuel fill cap.
7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .