GM Service Manual Online
For 1990-2009 cars only

Problem

Action

There is low pressure due to the power steering pump.

Inspect the steering system for the following conditions:

    • A stuck or inoperative flow control valve
    • A pressure plate that is not flat against the ring
    • An extremely worn ring
    • Scoring on one of the following components:
       - The pressure plate
       - The thrust plate
       - The rotor
    • Vanes sticking in the rotor slots
    • A break or crack on one of the following components:
       - The thrust plate
       - The pressure plate
    • A high internal leakage