GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Disconnect the negative battery cable. Refer to

    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.

    in General Information.
  2. Disconnect the four terminal PCM connector.

  3. Object Number: 21392  Size: SH
  4. Remove the ignition coil module screws.
  5. Remove the ignition coil module.

Installation Procedure

    Notice: A package of silicone grease is included with a new ICM. This grease is necessary for ignition coil and ICM cooling.

  1. Apply silicone grease to the ignition coil module mating surfaces.

  2. Object Number: 21392  Size: SH
  3. Install the ignition coil module screws.
  4. Tighten
    Tighten the ignition coil module screws to 1.7 N·m (14 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. Install the new ignition coil module.
  6. Connect the four terminal PCM connector.
  7. Connect the negative battery cable.
  8. Tighten
    Tighten the negative battery cable to 15 N·m (11 lb ft).