GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 177473  Size: SH
  1. Disconnect the vacuum check valve from the vacuum brake booster.
  2. Disconnect the vacuum hose from the intake manifold.
  3. Remove the check valve from the vacuum hose.

Installation Procedure


    Object Number: 177473  Size: SH
  1. Install vacuum check valve to vacuum hose.
  2. Connect the vacuum hose to the intake manifold.
  3. Connect the vacuum check valve to vacuum brake booster.