GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.


    Object Number: 465982  Size: SH
  1. Remove the ignition coil(s). Refer to Ignition Coil Replacement .
  2. Important: Make sure that any water and/or debris is blown out of the spark plug holes prior to removing the spark plugs.

  3. Remove the spark plugs using a 5/8 inch spark plug socket.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 465982  Size: SH

    Notice: Do not coat spark plug threads with anti-seize compound. If anti-seize compound is used and spark plugs are over-torqued, damage to the cylinder head threads may result.

    Specification
    The spark plug gap is 0.90 mm (0.035 in).

    Install the spark plugs.

    Tighten
    Tighten the plugs to 20 N·m (15 lb ft).

  1. Apply dielectric compound to the spark plug boots and make sure no corrosion is present.
  2. Install the ignition coil(s). Refer to Ignition Coil Replacement .