GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 37088-A Fuel Line Quick-Connect Tools

Removal 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: 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.


    Object Number: 180378  Size: SH
  1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief .

  2. Object Number: 292036  Size: SH
  3. Clean all the engine fuel pipe connections and areas surrounding the connections before disconnecting the pipes to avoid contamination of the fuel system.
  4. Disconnect the fuel feed (1) fuel return (5) quick-connect fittings from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .

  5. Object Number: 32189  Size: SH
  6. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  7. Disconnect the fuel line on the engine-side of the in-line fuel filter. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Cap the in-line fuel filter pipe, the fuel feed pipe, and the fuel return pipe as needed to stop any fuel leakage.
  9. Important: You may need to partially lower the engine cradle.

  10. Remove the fuel feed, the fuel return, and the evaporative emission (EVAP) pipe attaching hardware and pipes. Note the position of the hardware for the installation.
  11. Inspect the pipes for bends, kinks, and cracks.
  12. Repair or replace the pipes as required.

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.


    Object Number: 32189  Size: SH
  1. Install the new fuel feed, fuel return, and EVAP pipes and attaching hardware as noted during the removal.
  2. Remove the caps from the in-line fuel filter pipe, the fuel feed pipe, and the fuel return pipe.

  3. Object Number: 292036  Size: SH
  4. Install the new plastic connector retainers on the fuel pipes.
  5. Connect the line at the in-line fuel filter. Refer to Plastic Collar Quick Connect Fitting Service .
  6. Lower the vehicle.
  7. Connect the fuel feed (1) and fuel return (2) line quick-connect fitting to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
  8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  9. Perform the following procedure to inspect for fuel leaks:
  10. 8.1. Turn ON the ignition for 2 seconds.
    8.2. Turn OFF the ignition for 10 seconds.
    8.3. Turn ON the ignition.
    8.4. Inspect for fuel leaks.

    Object Number: 289014  Size: SH
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.