GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Ignition Coil Replacement

Removal Procedure

    Object Number: 1608869 Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement.
  2. Disconnect the manifold absolute pressure (MAP) sensor electrical connector (1).
  3. Disconnect the ignition coil electrical connector (6).

    4. Object Number: 1608802 Size: SH
  4. Disconnect the left side spark plug wires from the ignition coil.

    5. Object Number: 1608803 Size: SH
  5. Disconnect the right side spark plug wires from the ignition coil.

    6. Object Number: 1646089 Size: SH
  6. Remove the ignition coil bolts/nuts.
  7. Remove the ignition coil.
  8. Remove the ignition coil studs, if necessary.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1646089 Size: SH
  1. Install the ignition coil studs, if necessary.

    2. Tighten
    Tighten the studs to 25 N·m (15 lb ft).

  2. Install the ignition coil bolts/nuts.

    3. Tighten
    Tighten the bolts/nuts to 25 N·m (15 lb ft).


    Object Number: 1608803 Size: SH
  3. Connect the right side spark plug wires to the ignition coil.

    4. Object Number: 1608802 Size: SH
  4. Connect the left side spark plug wires to the ignition coil.

    5. Object Number: 1608869 Size: SH
  5. Connect the ignition coil electrical connector (6).
  6. Connect the MAP sensor electrical connector (1).
  7. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement.