GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Monte Carlo 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Plastic Collar Quick Connect Fitting Service

Removal Procedure

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.

Caution: Place a dry chemical (Class B) fire extinguisher nearby before performing any on-vehicle service procedures. Failure to follow these precautions may result in personal injury.

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. If metal collar quick connect fittings are used, refer to Metal Collar Quick Connect Fitting Service for the correct service procedure.

    3. Object Number: 12775 Size: SH
  3. Grasp both sides of the quick-connect fitting. Twist quick-connect fitting ¼ turn in each direction to loosen any dirt within fitting.
  4. Repeat for other fuel pipe fitting.

    5. Caution: Wear safety glasses when using compressed air in order to prevent eye injury.


    Object Number: 155410 Size: SH
  5. Blow out dirt from quick-connect fittings at both ends, using compressed air.

    6. Object Number: 12777 Size: SH
  6. Squeeze plastic tabs of male end connector.

    7. Object Number: 12778 Size: SH
  7. Pull connection apart.

    8. Repeat for the other fitting.

  8. Wipe off the male pipe end using a clean shop towel.
  9. 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 oil to the male pipe end.

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

    3. Object Number: 155399 Size: SH
  3. Pull on both sides of the quick connect fitting in order to make sure the connection is secure.