GM Service Manual Online
For 1990-2009 cars only

Ignition Coil Replacement with Electronic Ignition

Removal Procedure


    Object Number: 709591  Size: SH
  1. Disconnect the ignition coils harness connectors.
  2. Disconnect the spark plug wire at the ignition coils.

  3. Object Number: 309850  Size: SH
  4. Remove the ignition coil mounting bolts.
  5. Remove the ignition coil.

Installation Procedure


    Object Number: 309850  Size: SH
  1. Install the ignition coil.
  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.

  3. Install the ignition coil mounting bolts.
  4. Tighten
    Tighten the ignition coil mounting bolts to 12 N·m (106 lb in).


    Object Number: 709591  Size: SH
  5. Connect the spark plug wire at the ignition coil.
  6. Connect the ignition coil harness connector.

Ignition Coil Replacement with Distributor Ignition

Removal Procedure

  1. Disconnect the negative battery terminal.
  2. Disconnect the electrical connectors.
  3. Remove the ignition coil wire to the distributor.

  4. Object Number: 31466  Size: SH
  5. Remove the studs holding the bracket and the ignition coil to the intake manifold.
  6. Remove the bracket and the ignition coil.
  7. Remove the two rivets that connect the ignition coil to the ignition coil bracket by drilling and them out.
  8. Remove the ignition coil from the bracket.

Installation Procedure

    Important: A replacement ignition coil kit comes with 2 screws in order to attach the ignition coil to the bracket.

  1. Install the ignition coil to the bracket with the 2 screws.
  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.


    Object Number: 31466  Size: SH
  3. Install the ignition coil and the bracket to the intake manifold with studs.
  4. Tighten
    Tighten the studs to 11 N·m (97 lb in).

    Important: Verify the coil wire does not contact any metal objects. Rubbing will make a ground or short after time of use.


    Object Number: 387772  Size: SH
  5. Install the ignition coil wire.
  6. Install the electrical connectors.
  7. Install the negative battery terminal.