GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

A groaning or growling noise is present in the steering pump.

    • Grounded power steering lines
    • A scored pressure plate
    • A scored thrust plate
    • A scored rotor
    • A worn cam ring
    • A low pressure relief reservoir cap
    • Restricted fluid lines (high back pressure)
    • Air ingestion in the return line
    • A damaged flow control valve
    • A low fluid level
    • Loose pump mounting bolts