GM Service Manual Online
For 1990-2009 cars only

Condition

Action

There is 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 as needed. Refer to Power Steering Pressure Pipe/Hose Replacement or Power Steering Return Hose Replacement .

There is excessive back pressure in the steering gear.

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

The pressure plate is scored.

Replace the power steering pump. Refer to Power Steering Pump Replacement .

The thrust plate is scored.

Replace the power steering pump. Refer to Power Steering Pump Replacement .

The rotor is scored.

Replace the power steering pump. Refer to Power Steering Pump Replacement .

The pump ring is worn.

Replace the power steering pump. Refer to Power Steering Pump Replacement .