GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

J 34730 Fuel Pressure Gauge

Caution: In order to reduce the risk of fire and personal injury observe the following items:

   • Replace all nylon fuel pipes that are nicked, scratched or damaged during installation, do not attempt to repair the sections of the nylon fuel pipes
   • Do not hammer directly on the fuel harness body clips when installing new fuel pipes. Damage to the nylon pipes may result in a 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.
   • Apply a few drops of clean engine oil to the male pipe ends before connecting fuel pipe fittings. 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: Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering the open pipes and passages.

Important: Always maintain cleanliness when servicing the fuel system components.


    Object Number: 292143  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. Caution: Provide additional support when a vehicle is on a hoist:

       • Before removing parts, support the opposite end. This helps prevent the vehicle from slipping off.
       • Before removing major components, chain the vehicle frame to the hoist pads at the same end as the removal. This helps avoid a tip-off.
    Failure to follow these precautions could cause vehicle damage, serious personal injury, or death.

  4. Raise the vehicle.
  5. Remove the fuel tank. Refer to Fuel Tank Replacement .

  6. Object Number: 32153  Size: SH
  7. Disconnect the fuel feed, the fuel return, and the EVAP pipe quick-connect fittings at the fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Cap the fuel sender fuel pipes and the in-line fuel filter pipes as needed to stop any fuel leakage.
  9. Remove the fuel feed, fuel return, and EVAP pipe attaching hardware and pipes. Note the position of the pipes and the attaching hardware for the installation.

Installation Procedure

Caution: In order to reduce the risk of fire and personal injury observe the following items:

   • Replace all nylon fuel pipes that are nicked, scratched or damaged during installation, do not attempt to repair the sections of the nylon fuel pipes
   • Do not hammer directly on the fuel harness body clips when installing new fuel pipes. Damage to the nylon pipes may result in a 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.
   • Apply a few drops of clean engine oil to the male pipe ends before connecting fuel pipe fittings. 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: Always re-attach the fuel lines and fuel filter with all original type fasteners and hardware.

Do not repair sections of fuel pipes.

Notice: 

   • Secure the fuel pipes to the frame in order to prevent chafing. Maintain a minimum of 13 mm (½ inch) clearance around a pipe in order to prevent contact and chafing. Maintain a minimum of 19 mm (¾ inch) around any moving part.
   • Do not allow the fuel pipes to come into contact with the fuel tank or underbody.

  1. Install the new fuel feed, the fuel return, and the EVAP pipes, and the hardware as noted during removal.
  2. Remove the caps from the in-pipe fuel filter pipes and the fuel sender fuel pipes.

  3. Object Number: 32153  Size: SH
  4. Install the fuel feed, the fuel return, and the EVAP pipe quick-connect fittings at the fuel sender assembly. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Inspect and make sure all of the fuel pipe bundle clips and fasteners are properly installed.

  6. Object Number: 292143  Size: SH
  7. Install the fuel tank. Refer to Fuel Tank Replacement .
  8. Lower the vehicle.
  9. Remove the fuel fill cap add fuel to the vehicle.
  10. Install the fuel tank filler cap.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  12. Perform the following procedure to check for leaks:
  13. 10.1. Turn the ignition switch to the ON position for 2 seconds.
    10.2. Turn the ignition switch to the OFF for 10 seconds.
    10.3. Turn the ignition switch to the ON position again.
    10.4. Visually inspect the fuel system for fuel leaks.
  14. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.