GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 923830  Size: SH
  1. Disconnect the vacuum hose and the brake booster vacuum check valve (1) from vacuum brake booster (2).

  2. Object Number: 924495  Size: SH
  3. Disconnect the vacuum hose (2) from the intake manifold vacuum port (1).

  4. Object Number: 688567  Size: SH
  5. Remove the brake booster vacuum check valve (2) from the brake booster vacuum hose (1).

Installation Procedure


    Object Number: 688567  Size: SH
  1. Install the brake booster vacuum check valve (2) to the brake booster vacuum hose (1).

  2. Object Number: 924495  Size: SH
  3. Connect the vacuum hose (2) to the intake manifold vacuum port (1).

  4. Object Number: 923830  Size: SH
  5. Connect the vacuum hose and vacuum brake booster check valve (1) to vacuum brake booster (2).