GM Service Manual Online
For 1990-2009 cars only

Spark Plug Wire Harness Replacement 3800 V6 L36

Removal Procedure

Tools Required

J 38491 Spark Plug Heat Shield Removal Tool

  1. Turn OFF the ignition switch.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.

  3. Object Number: 406049  Size: SH

    Notice: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.

  4. Remove the spark plug wires at the rear of the engine using the following steps:
  5. • Note the position of the spark plug wires before removing the wires.
    • Twist the spark plug boot 1/2 turn before removing the boot.
    • Gently pry the heat shield up from spark plugs using the J 38491 .
    • Remove the spark plug wires form the spark plugs at the rear of the engine.

    Object Number: 194231  Size: SH
  6. Remove the spark plug wires (1,3,5) from the spark plugs at the front of the engine using the following steps:
  7. • Note the position of the spark plug wires before removing the wires.
    • Twist the spark plug boot 1/2 turn before removing the boot.
    • Gently pry the heat shield up from spark plugs using the J 38491 .
    • Remove the spark plug wires form the spark plugs at the front of the engine.

    Object Number: 194253  Size: SH
  8. Remove the spark plug wires from the wire looms.
  9. Remove the spark plug wires from the ignition control module.
  10. When replacing the spark plug wires transfer any of the following:
  11. • Boot heat shields
    • Spark plug wire conduit
    • Spark plug wire retaining clips

Installation Procedure


    Object Number: 380202  Size: MH
  1. Install the spark plug wires to the engine.
  2. Connect the spark plug wires (1-6) to the ignition control module in the proper position.

  3. Object Number: 162190  Size: SH
  4. Connect the spark plug wires to the wire looms.

  5. Object Number: 194231  Size: SH
  6. Connect the spark plug wires (1,3,5) to the spark plugs at the front of the engine.

  7. Object Number: 194244  Size: SH
  8. Connect the spark plug wires (2,4,6) to the spark plugs at the rear of the engine.
  9. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.