GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Chevy C Silverado - 2WD (CNG) 🢒 Engine 🢒 Engine Controls - 6.0L 🢒 Fuel Injector Control Module Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical in the C/K Pickup Service Manual.
  2. Remove enough of the forward right side wheelhouse panel retainers in order to gain access to the front of the wheelhouse. Refer to Wheelhouse Panel Replacement in Body Front End in the C/K Pickup Service Manual.

    3. Object Number: 1489171 Size: SH
  3. Loosen the fuel injection control module (FICM) mounting bracket screws (1).
  4. Remove the connector position assurance lock and disconnect the electrical connector from the FICM.
  5. Remove the lower right FICM mounting bracket screw (2).
  6. Remove the FICM mounting bracket assembly (3) from the vehicle.

    7. Object Number: 1489172 Size: SH
  7. Remove the FICM insulator (3) mounting nuts (4).
  8. Remove the FICM (2) from the mounting bracket (1).
  9. Remove the insulators (3) from the FICM.

Installation Procedure

    Object Number: 1489172 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.

  1. Install the FICM insulators (3) into the FICM (2).

    2. Tighten
    Tighten the insulators fingertight.

  2. Install the FICM (2) onto the mounting bracket (1) ensuring the connector is facing down.
  3. Install the insulator nuts (4).

    4. Tighten
    Tighten the nuts to 12 N·m (9 lb ft).


    Object Number: 1489171 Size: SH
  4. Slide the FICM mounting bracket (3) first onto one mounting screw (1) then onto the other mounting screw (1). Do not tighten the screws.
  5. Install the lower right FICM mounting bracket screw (2).

    6. Tighten
    Tighten all of the mounting screws to 12 N·m (9 lb ft).

  6. Connect the electrical connector to the FICM and install the connector position assurance lock.
  7. Install the right side wheelhouse panel retainers. Refer to Wheelhouse Panel Replacement in Body Front End in the C/K Pickup Service Manual.

    8. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  8. Install the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical in the C/K Pickup Service Manual.