GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1998 🢒 Silhouette Ext. 🢒 Engine 🢒 Engine Controls - 3.4L 🢒 Fuel Hoses/Pipes Replacement - Filter to Tank

Caution: In order to Reduce the Risk of Fire and Personal Injury:

   • If nylon fuel pipes are nicked, scratched or damaged during installation, Do Not attempt to repair the sections of the nylon fuel pipes. Replace them.
   • When installing new fuel pipes, Do Not hammer directly on the fuel harness body clips as it may damage the nylon pipes resulting in a possible fuel leak.
   • Always cover nylon vapor pipes with a wet towel before using a torch near them. Also, never expose the vehicle to temperatures higher than 115°C (239°F) for more than one hour, or more than 90°C (194°F) for any extended period.
   • 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.)

Notice: Do not attempt to straighten any kinked nylon fuel lines. Replace any kinked nylon fuel feed or return pipes in order to prevent damage to the vehicle.

Removal Procedure

    Object Number: 49906 Size: SH
  1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief .
  2. Drain the fuel tank. Refer to Fuel Tank Draining .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in general information.
  4. Remove the quick-connect fittings on the fuel feed and return pipes at the in-pipe fuel filter. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Cap the fuel sender fuel pipes and the in-pipe fuel filter pipes as needed to stop any fuel leakage.
  6. Remove the fuel tank. Refer to Fuel Tank Replacement .

    7. Object Number: 49752 Size: SH
  7. Remove the fuel feed and fuel return pipe attaching hardware.
  8. Remove the fuel feed and fuel return pipes from the fuel tank.
  9. Note the position of the fuel feed and return pipes and attaching hardware for installation.

Installation Procedure

Caution: In order to Reduce the Risk of Fire and Personal Injury: If nylon fuel pipes are nicked, scratched or damaged during installation, they must be replaced.


    Object Number: 49752 Size: SH
  1. Remove the caps from the fuel sender fuel pipes.
  2. Install new plastic connector retainers on the in-pipe fuel filter pipes and on the fuel sender fuel pipes.
  3. Install the new fuel feed, fuel return pipes to the fuel tank as noted during removal.
  4. Connect the quick-connect fittings on the fuel feed, and return pipes at the fuel tank. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Reinstall the fuel pipe attaching hardware as noted during removal.
  6. Reinstall the fuel tank. Refer to Fuel Tank Replacement .

    7. Object Number: 49906 Size: SH
  7. Remove the caps from the in-pipe fuel filter pipes.
  8. Connect the quick-connect fittings on the fuel feed and return pipes at the in-pipe fuel filter. Refer to Plastic Collar Quick Connect Fitting Service .
  9. Add fuel, and tighten the fuel fill cap.
  10. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.
  11. Inspect for leaks:
    12. 11.1. Turn the ignition switch ON for 2 seconds.
    11.2. Turn the ignition switch OFF for 10 seconds.
    11.3. Turn the ignition switch ON.
    11.4. Check for fuel leaks.