GM Service Manual Online
For 1990-2009 cars only

    Object Number: 4904  Size: SH
  1. Remove the cooling jacket plugs.
  2. 1.1. Use a suitable self-threading screw.
    1.2. Drill a hole into the cooling jacket plug.
    1.3. Install the self-threading screw.
    1.4. Pry out the cooling jacket plug.

    Object Number: 4905  Size: SH
  3. Remove the oil gallery screw plugs.
  4. Remove the cooling jacket drain plugs.