GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


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

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

Installation Procedure


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

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