GM Service Manual Online
For 1990-2009 cars only

    Object Number: 20703  Size: SH

    Important: The vent and the line pressure plug should only be removed if inspection indicated that either part is defective.

  1. Using a pair of pliers, grasp the vent (404). Using a twisting motion, remove the vent (404) from the case cover (401).

  2. Object Number: 20704  Size: SH
  3. Using a socket wrench, remove the line pressure plug (405) from the case cover (401).