GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38491 Spark Plug Boot Removal Tool

Removal Procedure


    Object Number: 1693864  Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Remove the front spark plug wires (2) from the ignition coils.
  3. Remove the rear spark plug wires (1) from the ignition coils.

  4. Object Number: 1686528  Size: SH
  5. Remove the spark plug wires from the spark plugs at the front of the engine using the following steps:
  6. 4.1. Note the position of the spark plug wires before removing the wires.
    4.2. Twist the spark plug boot 1/2 turn before removing the boot.
    4.3. Gently pry the heat shield up from spark plugs using the J 38491 .
    4.4. Remove the spark plug wires form the spark plugs at the front of the engine.
  7. Remove the spark plug harness from the retainer.
  8. Remove the air inlet grille. Refer to Air Inlet Grille Panel Replacement .
  9. Remove the spark plug wires from the spark plugs at the rear of the engine using the following steps:
  10. 7.1. Note the position of the spark plug wires before removing the wires.
    7.2. Twist the spark plug boot 1/2 turn before removing the boot.
    7.3. Gently pry the heat shield up from spark plugs using the J 38491 .
    7.4. Remove the spark plug wire from the spark plugs at rear of the engine.
  11. Remove the spark plug retainers from the rear lift bracket and fuel rail.

Installation Procedure


    Object Number: 1686528  Size: SH
  1. Install the spark plug wires to the spark plugs at the rear of the engine.
  2. Install the spark plug retainers to the rear lift bracket and fuel rail.
  3. Install the air inlet grille. Refer to Air Inlet Grille Panel Replacement .
  4. Install the spark plug wires to the spark plugs at the front of the engine.
  5. Install the spark plug harness to the retainer.

  6. Object Number: 1693864  Size: SH
  7. Install the rear spark plug wires (1) to the ignition coils.
  8. Install the front spark plug wires (2) to the ignition coils.
  9. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .