GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Engine 🢒 Engine Electrical 🢒 Ignition Control Module Replacement

Removal Procedure

    Object Number: 15977 Size: SH
  1. Disconnect the ignition control module (ICM) electrical connectors.
  2. Note position of spark plug wires for installation and disconnect the spark plug wires from the ignition coils.

    3. Object Number: 12299 Size: SH
  3. Remove the ignition coil screws (1).
  4. Remove the ignition coils (2) from the ICM (3).
  5. Remove the ICM from the module mounting bracket.

Installation Procedure

    Object Number: 12299 Size: SH
  1. Install the ICM to the module mounting bracket.
  2. Install the ignition coils (2) to the ICM (3).

    3. 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.

  3. Install the ignition coil screws (1).

    4. Tighten
    Tighten the screws to 4.5 N·m (40 lb in).


    Object Number: 15977 Size: SH
  4. Connect the spark plug wires as noted during the removal.
  5. Connect the ICM electrical connectors.
  6. Refer to Control Module References for programming and setup information.