GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 570561  Size: SH
  1. Disconnect the vacuum hose (2) from the check valve (1).
  2. Remove the vacuum check valve (1).
  3. Remove the grommet from the brake booster.

Installation Procedure


    Object Number: 570561  Size: SH
  1. Lubricate the following components with a thin layer of silicone grease:
  2. • The outside diameter of the grommet
    • The inside diameter of the grommet
  3. Install the grommet.
  4. Install the vacuum check valve (1).
  5. Connect the vacuum hose (2) to the check valve (1).