GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 824413  Size: SH

    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.

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Important: The ignition coils can be removed individually or as an assembly, depending on the repair being performed.

  3. If replacing an individual coil, disconnect the wire harness at the coil. If removing the coil assembly, disconnect the main coil harness connector.
  4. Disconnect the spark plug wire at the ignition coil (s).
  5. If replacing an individual coil, remove the ignition coil mounting bolts and/or nut that retains the coil to the coil bracket.
  6. If removing the coil assembly, remove the bolts securing the coil bracket to the valve rocker arm cover.
  7. Remove the ignition coil or coil assembly.

Installation Procedure


    Object Number: 824413  Size: SH
  1. Install the ignition coil or coil assembly.
  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 and/or nuts.
  4. Tighten
    Tighten the ignition coil-to-bracket bolts/nuts to 8 N·m (71 lb in).

    Tighten
    Tighten the ignition coil bracket-to-valve rocker arm cover bolts to bolts to 12 N·m (106 lb in).

  5. Connect the spark plug wire (s) at the ignition coil (s).
  6. Connect the individual ignition coil or main coil harness connector.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.