GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1677963  Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Disconnect the brake booster vacuum hose from the intake manifold.

  3. Object Number: 1675732  Size: SH
  4. Disconnect the manifold absolute pressure (MAP) sensor electrical connector (1).
  5. Disconnect the ignition coil electrical connector (2).

  6. Object Number: 1582091  Size: SH
  7. Disconnect the left side spark plug wires from the ignition coil.

  8. Object Number: 1582938  Size: SH
  9. Disconnect the right side spark plug wires from the ignition coil.

  10. Object Number: 1587660  Size: SH
  11. Remove the upper left coil mount bracket bolt (1).
  12. Raise the vehicle. refer to Lifting and Jacking the Vehicle .
  13. Disconnect the wire retainers on the ignition coil bracket.
  14. Remove the remaining bolt (1) and the two nuts (2) on the coil bracket.
  15. Lower the vehicle.
  16. Remove the ignition coil bracket assembly.

Installation Procedure


    Object Number: 1587660  Size: SH
  1. Install the ignition coil (3).
  2. Raise the vehicle.
  3. Install the upper right coil mount bolt.
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the coil mount nuts and tighten to 25 N·m (15 lb ft) .
  6. Connect the wire retainers to the coil bracket.
  7. Lower the vehicle.
  8. Install the upper left coil mount bolt and tighten to 25 N·m (15 lb ft) .

  9. Object Number: 1582938  Size: SH
  10. Connect the right side spark plug wires to the ignition coil.

  11. Object Number: 1582091  Size: SH
  12. Connect the left side spark plug wires to the ignition coil.

  13. Object Number: 1582011  Size: SH
  14. Connect the ignition coil electrical connector (2).
  15. Connect the MAP sensor electrical connector (1).

  16. Object Number: 1677963  Size: SH
  17. Connect the brake booster vacuum hose to the intake manifold.
  18. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .