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

Removal Procedure
  1. Remove the fuel injector sight shield (L67 engine only). Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.

    2. Important: Do not remove the spark plugs when the engine is warm.

    Clean any dirt or debris from the spark plug base area.


    Object Number: 166819 Size: SH
  2. Twist the spark plug boots ½ turn and remove the spark plug wires from the spark plugs.

    3. Object Number: 166820 Size: SH
  3. Remove the spark plugs from the engine.

Installation Procedure

    Notice: Refer to Component Fastener Tightening Notice in the Preface section.


    Object Number: 166820 Size: SH
  1. Install the spark plugs into the engine. Refer to Spark Plug Usage for the proper spark plug usage.

    2. Tighten
    Tighten the spark plugs to 15 N·m (11 lb ft).

    Important: Some engines use aluminum heat shields over the spark plug boots on cylinder which have spark plugs close to the exhaust system. Care should be taken to ensure that these shields are placed in the proper locations and fully seated.

  2. Install the spark plug wires over the spark plugs.
  3. Install the fuel injector sight shield (L67 engine only). Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.