GM Service Manual Online
For 1990-2009 cars only

Problem

Action

Stuck/inoperative control valve

  1. Clean the control valve.
  2. Inspect the control valve.
  3. Replace the control valve, if necessary. Refer to Control Valve Replacement.

Worn pump ring

  1. Inspect the pump ring.
  2. Replace the pump ring, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement .

Scored pressure plate

  1. Inspect the pressure plate.
  2. Replace the pressure plate, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement .

Scored thrust plate

  1. Inspect the thrust plate.
  2. Replace the thrust plate, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement .

Scored rotor

  1. Inspect the rotor.
  2. Replace the rotor, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement

Broken pressure plate

  1. Clean the pressure plate.
  2. Inspect the pressure plate.
  3. Replace the pressure plate, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement .

Broken thrust plate

  1. Clean the thrust plate.
  2. Inspect the thrust plate.
  3. Replace the thrust plate, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement .

Vanes sticking in the rotor slots

  1. Clean the vanes.
  2. Inspect the vanes.
  3. Replace the vanes, if necessary. Refer to Power Steering Pump Replacement or Power Steering Pump Replacement .