GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

There are two types of quick-connects used on fuel pipes. The metal-collar type uses J 37088-A Fuel Line Separator for removal. The plastic-collar type does not use any special tools for removal. Refer to Quick Connect Fitting Service .

Tools Required

    • J 34730 , Fuel Pressure Gauge
    • J 37088-A , Tool Set, Fuel Line Quick-Connect Separator

Important: Relieve the fuel system pressure before servicing any fuel system connection. Refer to Fuel Pressure Relief .

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the retainers from the quick-connect fitting if necessary.

  3. Object Number: 12775  Size: SH
  4. Grasp both sides of the fitting. Twist the female connector ¼ turn in each direction to loosen any dirt within the fitting.

  5. Object Number: 12776  Size: SH

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

  6. Blow dirt out of the fitting using compressed air.

  7. Object Number: 12780  Size: SH
  8. Choose the correct tool from J 37088-A Tool Set for the size of the fitting. Insert the tool into the female connector, then push inward to release the locking tabs.

  9. Object Number: 12782  Size: SH
  10. Pull the connection apart.
  11. 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.

  12. Using a clean shop towel, wipe off the male pipe end.
  13. Inspect both ends of the fitting for dirt and burrs. Clean or replace the components as required.

Installation Procedure


    Object Number: 12784  Size: SH

    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 pipe end.

  2. Object Number: 12786  Size: SH
  3. Push both sides of the fitting together to cause the retaining tabs to snap into place.

  4. Object Number: 12787  Size: SH
  5. Once installed, pull on both sides of the fitting to make sure the connection is secure.
  6. Install the retainers from the quick-connect fitting if necessary.

Quick Connect Fitting Service Service

Removal Procedure

Tools Required

J 34730 Fuel Pressure Gauge

Caution: Relieve the fuel system pressure before servicing fuel system components in order to reduce the risk of fire and personal injury.

After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. In order to reduce the chance of personal injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

  2. Object Number: 157703  Size: SH
  3. Grasp both sides of the quick-connect fitting. Twist the female connector ¼ turn in each direction in order to loosen any dirt within the quick-connect fitting.
  4. Caution: Wear safety glasses when using compressed air in order to prevent eye injury.


    Object Number: 155410  Size: SH
  5. Blow any dirt out of the quick-connect fitting using compressed air.

  6. Object Number: 12777  Size: SH
  7. Squeeze the plastic retainer release tabs.

  8. Object Number: 12778  Size: SH
  9. Pull the connection apart.
  10. Notice: Use an emery cloth in order to remove rust or burrs from the fuel pipe. Use a radial motion with the fuel pipe end in order to prevent damage to the O-ring sealing surface.

  11. Use a clean shop towel in order to wipe off the male fuel pipe end.
  12. Inspect both ends of the quick-connect fitting for dirt and burrs.
  13. Clean or replace components/assemblies as required.

Installation Procedure

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.


    Object Number: 155425  Size: SH
  1. Apply a few drops of clean engine oil to the male fuel pipe end.

  2. Object Number: 155771  Size: SH
  3. Push both sides of the quick-connect fitting together in order to cause the retaining tabs/fingers to snap into place.

  4. Object Number: 155399  Size: SH
  5. Once installed, pull on both sides of the quick-connect fitting in order to make sure the connection is secure.