GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Montana Ext. 🢒 Engine 🢒 Engine Controls - 3.4L 🢒 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.

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

    2. Object Number: 12775 Size: SH
  2. Grasp both sides of the quick-connect fitting. Twist the female connector 1/4 turn in each direction in order to loosen any dirt within the quick-connect fitting.

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


    Object Number: 12776 Size: SH
  3. Blow any dirt out of the quick-connect fitting using compressed air.

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

    5. Object Number: 12778 Size: SH
  5. Pull the connection apart.

    6. 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.

  6. Use a clean shop towel in order to wipe off the male fuel pipe end.
  7. Inspect both ends of the quick-connect fitting for dirt and burrs.
  8. 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: 12784 Size: SH
  1. Apply a few drops of clean engine oil to the male fuel pipe end.

    2. Object Number: 12786 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: 12787 Size: SH
  3. Once installed, pull on both sides of the quick-connect fitting in order to make sure the connection is secure.
  4. Tighten the fuel filler cap.
  5. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.
  6. Inspect for leaks.
    7. 6.1. Turn the ignition switch ON for 2 seconds.
    6.2. Turn the ignition switch OFF for 10 seconds.
    6.3. Turn the ignition switch ON.
    6.4. Check for fuel leaks.