GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 STS 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Brake Booster Pump Replacement

Removal Procedure

    Object Number: 1919936 Size: SH
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  2. Release the vacuum brake booster hose quick connect (1).
  3. Disconnect the vacuum brake booster hose from the auxiliary pump.
  4. Disconnect the auxiliary pump electrical connector.

    5. Object Number: 1919939 Size: SH
  5. Remove the auxiliary pump bracket nut (1).

    6. Object Number: 1919941 Size: SH
  6. Remove the auxiliary pump bracket bolt (1).
  7. Remove the auxiliary pump from the engine.

    8. Object Number: 1919947 Size: SH
  8. Remove the auxiliary pump assembly bolts (1) and nuts (2).

    9. Object Number: 1919955 Size: SH
  9. Remove the auxiliary pump insulator sleeves (1).
  10. Remove the auxiliary pump insulators (2).
  11. Release the auxiliary pump electrical harness connector (3) from the bracket and remove the pump.

Installation Procedure

    Object Number: 1919955 Size: SH
  1. Assemble the auxiliary pump sleeves (1) to the insulators (2).
  2. Install the auxiliary pump insulators.
  3. Position the auxiliary pump to the bracket and secure the electrical harness connector (3).

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


    Object Number: 1919947 Size: SH
  4. Install the auxiliary pump assembly bolts (1) and nuts (2).

    5. Tighten
    Tighten the bolts and nuts to 10 N·m (89 lb in).


    Object Number: 1919941 Size: SH
  5. Install the auxiliary pump assembly to the engine.
  6. Install the auxiliary pump assembly bracket bolt (1).

    7. Tighten
    Tighten the bolt to 22 N·m (16 lb ft).


    Object Number: 1919939 Size: SH
  7. Install the auxiliary pump assembly bracket nut (1).

    8. Tighten
    Tighten the bolt to 70 N·m (52 lb ft).


    Object Number: 1919936 Size: SH
  8. Connect the auxiliary pump assembly electrical connector.
  9. Connect the vacuum brake booster hose from the auxiliary pump.
  10. Install the vacuum brake booster hose quick connect (1).
  11. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .