GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 643424  Size: SH
  1. Remove the air cleaner outlet from the air cleaner.
  2. Remove the ICM electrical connectors (1) and spark plug wires (2).
  3. Remove the ignition coils bolts for the affected coil.
  4. Remove the ignition coils.

Installation Procedure


    Object Number: 643424  Size: SH
  1. Install the ignition coils.
  2. 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.

    Tighten
    Tighten the ignition coils bolts (3) to 4 N·m (35 lb in).

  3. Reinstall the spark plug wires (2) and ICM electrical connectors (1).
  4. Reinstall the air cleaner outlet duct to the air cleaner.