GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 6.6L 🢒 Fuel Filter Assembly Replacement

Removal Procedure
  1. Drain the fuel from the fuel filter housing. Refer to Water-in-Fuel Draining .
  2. Disconnect the fuel heater and water-in-fuel sensor harness connectors.

    3. Object Number: 660432 Size: SH
  3. Disconnect the fuel hoses from the fuel filter/heater element housing.
  4. Disconnect electrical and vacuum lines from:
    5. • EGR valve vent solenoid
    • EGR valve vacuum sensor
    • EGR valve solenoid
  5. Remove bolts retaining sensor/bracket assembly.
  6. Remove the fuel filter bracket-to-valve cover bolts.
  7. Remove the filter/heater element housing.
  8. Remove the fuel filter bracket from the fuel filter/heater element housing.
  9. Spin off the fuel filter from the fuel filter/heater element housing.
  10. Inspect the fuel filter and replace if necessary.

Installation Procedure

    Object Number: 660432 Size: SH
  1. Install the fuel filter to the fuel filter/heater element housing.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the fuel filter bracket to the fuel filter/heater element housing.

    3. Tighten
    Tighten the bracket-to-housing bolts to 20 N·m (15 lb ft).

  3. Install the filter/heater element housing to the valve cover.

    4. Tighten
    Tighten the fuel filter bracket-to-valve cover bolts to 20 N·m (15 lb ft).

  4. Install the EGR sensor bracket assembly and bolts.

    5. Tighten
    Tighten bolts to 10 N·m (89 lb in).

  5. Connect electrical and vacuum to:
    6. • EGR valve vent solenoid
    • EGR valve vacuum sensor
    • EGR valve solenoid
  6. Connect the fuel hoses to the fuel filter/heater element housing.
  7. Prime the fuel system. Refer to Fuel Feed Pipe and Return Pipe Purging .
  8. Connect the fuel heater and water-in-fuel sensor harness connectors.
  9. Connect the negative battery cables. Refer to Battery Negative Cable Disconnection and Connection .
  10. Start the engine and inspect for fuel leaks.