GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Ignition Control Module Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Disconnect the 14-way connector from the ignition control module.
  3. Disconnect the spark plug wires from the coil assemblies (note the position that the wires were removed).

    4. Object Number: 12299 Size: SH
  4. Remove 6 screws (1) securing the coil assemblies to the ignition control module.
  5. Remove the coils (2) from the ignition control module (3).
  6. Remove the 2 nuts and washers under the module bracket.
  7. Remove the ignition control module.

Installation Procedure
  1. Attach the coils to (2) the ignition control module (3). Refer to Ignition Coil Replacement .

    2. Object Number: 12299 Size: SH

    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.

  2. Install 6 ignition coil attaching screws (1).

    3. Tighten:
    Tighten the screws to 4-5 N·m (40 lb in).

  3. Install the nuts and washers securing the ignition control module assembly to the mounting bracket.

    4. Tighten:
    Tighten the nuts to 8 N·m (70 lb in).

  4. Connect the spark plug wires.
  5. Connect the 14-way connector to module.
  6. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.