GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .

  3. Object Number: 1811485  Size: SH
  4. Disconnect the engine wiring harness electrical connector(s) (1) from the ignition coil(s).

  5. Object Number: 1578474  Size: SH
  6. Remove the ignition coil bolt(s).
  7. Remove the ignition coil(s).

Installation Procedure


    Object Number: 1578474  Size: SH
  1. Install the ignition coil(s).
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the ignition coil bolt(s).
  4. Tighten
    Tighten the bolt(s) to 10 N·m (89 lb in).


    Object Number: 1811485  Size: SH
  5. Connect the engine wiring harness electrical connector(s) (1) to the ignition coil(s).
  6. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  7. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .

Removal Procedure

  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
  2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement.

  3. Object Number: 1811485  Size: SH
  4. Disconnect the engine wiring harness electrical connector(s) (1) from the ignition coil(s).

  5. Object Number: 1578474  Size: SH
  6. Remove the ignition coil bolt(s).
  7. Remove the ignition coil(s).

Installation Procedure


    Object Number: 1578474  Size: SH
  1. Install the ignition coil(s).
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the ignition coil bolt(s).
  4. Tighten
    Tighten the bolt(s) to 10 N·m (89 lb in).


    Object Number: 1811485  Size: SH
  5. Connect the engine wiring harness electrical connector(s) (1) to the ignition coil(s).
  6. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement.
  7. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.