GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 GMC K Sierra - 4WD 🢒 Engine 🢒 Engine Controls - 6.6L 🢒 Fuel Injector Control Module Replacement

Removal Procedure

    Object Number: 662504 Size: SH
  1. Disconnect the negative battery cable . Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Unsnap the positive battery cable cap.
  3. Loosen the positive battery cable bolt.
  4. Remove the positive battery cable.
  5. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  6. Remove the fuel fill cap in order to relieve the fuel pressure.

    7. Object Number: 660358 Size: SH
  7. Cut and discard the large tie straps from the control module (6) and harness.
  8. Remove the fuel line bolts (4) from the control module (6).
  9. Remove the control module bolts (1, 5).
  10. Remove the control module insulators (2) between the module and bracket.

    11. Object Number: 744247 Size: SH

    Important: Do not break off the tab on the electrical connector.

  11. Disconnect the control module electrical connectors (2).

    12. Object Number: 744237 Size: SH
  12. Remove the fuel lines (2) from the control module (1) and discard washers.
  13. Remove the control module (1) from the bracket.

Installation Procedure

    Object Number: 660358 Size: SH

    Important: Do not knock off the insulators when installing the fuel injector control module to the bracket.

  1. Install the insulators (2) to the control module (6).
  2. Install the control module.

    3. Object Number: 744237 Size: SH
  3. Install by hand the fuel lines (2) and bolts with new washers to the control module (1).

    4. Object Number: 660358 Size: SH

    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.

  4. Install the control module bolts (1, 5).

    5. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 744247 Size: SH
  5. Connect the control module electrical connectors (2).

    6. Object Number: 660358 Size: SH
  6. Install the fuel line bolts (4) to the control module (6).
  7. Tighten the eyebolts (4).

    8. Tighten
    Tighten the bolts to 35 N·m (26 lb ft).

  8. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .

    9. Object Number: 662504 Size: SH
  9. Install the positive battery cable.
  10. Tighten the positive battery cable bolt.

    11. Tighten
    Tighten the bolt to 17 N·m (13 lb ft).

  11. Snap the positive battery cable cap closed.
  12. Connect the negative battery cable . Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  13. Install the fuel fill cap.
  14. Depress the fuel manager primer button 30 times.
  15. Start the engine. If the engine stalls, repeat steps 13 and 15.
  16. Inspect for fuel leaks.