GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Bonneville 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Spark Plug Wire Harness Replacement

Removal Procedure

Important: 

   • Do not remove the spark plugs when engine is warm.
   • Clean dirt and debris from the spark plug recess area.
   • Use care when removing the spark plug boots from the spark plugs. Twist the boot ½ turn before removing the boot and the PULL ON THE BOOT ONLY to remove it. DO NOT PULL ON THE WIRE as this may damage the spark plug wire.

  1. Verify that the ignition system is off.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.

    3. Object Number: 450548 Size: SH
  3. Remove spark plug wires from the ignition coils.
  4. Remove the spark plug wires from the intake manifold channels.
  5. Remove the spark plug wires from the spark plug and the vehicle.

Installation Procedure
  1. Position the spark plug wires on top of the engine
  2. Install the spark plug wires into the intake manifold cover channels.
  3. Connect the spark plug wires to the spark plugs. Make sure the boots are fully seated.
  4. Connect the spark plug wires to the ignition coils.
  5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.