GM Service Manual Online
For 1990-2009 cars only

Power Brake Booster Vacuum Check Valve and Hose Replacement LA1

Removal Procedure


    Object Number: 846594  Size: SH
  1. Disconnect the vacuum hose from the check valve (1).
  2. Remove the vacuum check valve (1).
  3. Remove the clamp from the vacuum hose (2).

  4. Object Number: 847022  Size: SH
  5. Disconnect the vacuum hose from the Vacuum Pipe.
  6. Remove the vacuum hose.

Installation Procedure


    Object Number: 847022  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

    Object Number: 846594  Size: SH
  3. Connect the vacuum hose to the vacuum pipe (2).
  4. Install the vacuum check valve (1).

Power Brake Booster Vacuum Check Valve and Hose Replacement L61

Removal Procedure


    Object Number: 846594  Size: SH
  1. Disconnect the vacuum hose from the check valve (1).
  2. Remove the vacuum check valve (1).
  3. Remove the clamp from the vacuum hose (2).

  4. Object Number: 847022  Size: SH
  5. Disconnect the vacuum hose from the Vacuum Pipe.
  6. Remove the vacuum hose.

Installation Procedure


    Object Number: 847022  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

    Object Number: 846594  Size: SH
  3. Connect the vacuum hose to the vacuum pipe (2).
  4. Install the vacuum check valve (1).