GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Brake Booster Auxiliary Pump Replacement

Removal Procedure

    Object Number: 888257 Size: SH
  1. Remove the vacuum hose from the pump.
  2. Disconnect the electrical connector.
  3. Remove the pump nuts.
  4. Remove the pump from the booster by pulling the inlet tube out of the grommet.

Installation Procedure

    Object Number: 888257 Size: SH
  1. Install the pump to the booster by pushing the inlet tube into the grommet and aligning the studs to the holes.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the pump nuts.

    3. Tighten
    Tighten the nuts to 18N·m (13 lb ft).

  3. Connect the electrical connector.
  4. Install the vacuum hose to the pump.