GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Engine 🢒 Engine Controls - 3.8L (L36 and L67) 🢒 Ignition Control Module Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Remove the 14-way electrical connector from the ignition control module (ICM).
  3. Disconnect the spark plug wires from the coil assemblies. Before removing the wires, note the position of the wires .

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

Installation Procedure

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

  4. Connect the spark plug wires.
  5. Connect the 14-way electrical connector to the module.

    6. Tighten
    Tighten the screw to 2.1 N·m (19 lb in).

  6. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  7. Refer to Control Module References for programming and setup information.