GM Service Manual Online
For 1990-2009 cars only

In-Line Fuel Filter Replacement Non-Cartridge Type Filter

Removal Procedure

Important: If the in-line filter is plugged, the fuel tank should be inspected internally and cleaned if necessary.

  1. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .

  3. Object Number: 34089  Size: SH
  4. Disconnect the fuel feed pipes at the filter.
  5. Remove the in-line fuel filter clamp attaching hardware.
  6. Remove the clamp from the filter.

Installation Procedure

  1. Remove the protective caps from the new filter.
  2. Install the clamp to the filter.
  3. Install the in-line filter clamp attaching hardware.
  4. Install in the same positions as on the old filter noting direction of fuel flow arrow.


    Object Number: 34089  Size: SH
  5. Connect the fuel feed pipes to the filter and tighten.
  6. Connect the negative battery cable.
  7. Inspect for fuel leaks.
  8. 6.1. Turn ON the ignition switch for 2 seconds.
    6.2. Turn OFF the ignition switch for 10 seconds.
    6.3. Again, turn the ignition switch to the ON position.
    6.4. Check for fuel leaks.

In-Line Fuel Filter Replacement Cartridge Type

Removal Procedure

Important: If the in-line filter is plugged, the fuel tank should be inspected internally and cleaned if necessary.

Caution: Do not drain the fuel into an open container. Never store the fuel in an open container due to the possibility of a fire or an explosion.

  1. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  3. Have a dry chemical (Class B) fire extinguisher nearby.


    Object Number: 66055  Size: SH
  4. Turn the filter housing counterclockwise and allow the fuel remaining in the filter housing to drain into an approved container.
  5. Remove the fuel filter housing and gasket from the base.
  6. Remove the fuel filter cartridge.
  7. Inspect the inside of the housing for signs of rust or corrosion. Discard the housing if rust or corrosion is present.

Installation Procedure

  1. Install a new housing gasket.
  2. Apply a few drops of clean engine oil to the gasket.


    Object Number: 66055  Size: SH
  3. Install the new filter cartridge.
  4. Connect the housing to the base.
  5. Tighten

        • Tighten the filter housing until the gasket seats.
        • Tighten filter housing 3/4 of a turn after gasket contacts.
  6. Check for fuel leaks.
  7. 4.1. Turn ON the ignition switch for 2 seconds.
    4.2. Turn OFF the ignition switch for 10 seconds.
    4.3. Again, turn the ignition switch to the ON position.
    4.4. Check for fuel leaks.