GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Allure 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Brake Booster Vacuum Check Valve and Hose Replacement

Removal Procedure
  1. Remove the fuel injector sight shield, 3.8L engine only. Refer to Fuel Injector Sight Shield Replacement.

    2. Object Number: 176823 Size: SH
  2. Disconnect the vacuum hose from the intake manifold.
  3. Disconnect the vacuum hose (2) from the vacuum brake booster check valve (1).
  4. Remove the vacuum brake booster check valve (1) from the vacuum brake booster.

Installation Procedure

    Object Number: 176823 Size: SH
  1. Install the vacuum brake booster check valve (1) onto the vacuum brake booster.
  2. Connect the vacuum hose (2) to the vacuum brake booster (1).
  3. Connect the vacuum hose to the intake manifold.
  4. Install the fuel injector sight shield, 3.8L engine only. Refer to Fuel Injector Sight Shield Replacement.