GM Service Manual Online
For 1990-2009 cars only

Ignition Control Module Replacement ICM

Removal Procedure


    Object Number: 12299  Size: SH
  1. Disconnect the 14-way connector at ignition control module.
  2. Disconnect the spark plug wires from the ignition coils.
  3. Remove the 6 screws securing coil assemblies to ignition control module.
  4. Disconnect the ignition coils from ignition control module.
  5. Remove the ignition control module.

Installation Procedure


    Object Number: 12299  Size: SH
  1. Position the ignition control module onto the bracket.
  2. Position the ignition coils onto the ignition control module.
  3. Hand start 6 screws through the ignition coils and module to the bracket.
  4. Tighten
    Tighten screws to 4-5 N·m(40 lb in).

    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.

  5. Connect the spark plug wires to the ignition coils.
  6. Connect the 14-way connector to the ignition control module.

Ignition Control Module Replacement Ignition Coils

Removal Procedure


    Object Number: 12299  Size: SH
  1. Disconnect the spark plug wires.
  2. Remove the 2 screws securing the ignition coil to the ignition control module.
  3. Remove the ignition coil.

Installation Procedure


    Object Number: 12299  Size: SH
  1. Position and install the ignition coil onto the ignition control module.
  2. Install 2 screws.
  3. Tighten
    Tighten screws to 4-5 N·m (40 lb in).

    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. Connect the spark plug wires.