GM Service Manual Online
For 1990-2009 cars only

Problem

Action

Excessive back pressure in the power steering hoses

  1. Inspect the power steering hoses for restrictions. Refer to Power Steering System Test .
  2. Replace the power steering hoses. Refer to Power Steering Pressure Pipe/Hose Replacement or Power Steering Return Hose Replacement .

Excessive back pressure in the steering gear

  1. Inspect the power steering gear for restrictions. Refer to Power Steering System Test .
  2. Replace the power steering gear. Refer to Steering Gear Replacement .

Scored pressure plate

  1. Inspect the pressure plate for scores.
  2. Replace the power steering pump. Refer to Power Steering Pump Replacement .

Scored thrust plate

  1. Inspect the thrust plate for scores.
  2. Replace the power steering pump. Refer to Power Steering Pump Replacement .

Scored rotor

  1. Inspect the rotor for scores.
  2. Replace the power steering pump. Refer to Power Steering Pump Replacement .

Worn pump ring

  1. Inspect the pump ring.
  2. Replace the power steering pump. Refer to Power Steering Pump Replacement .