GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

Hard steering or a lack of assist especially during parking/turning/steering wheel

    • A Variable Effort steering system malfunction.
    • A damaged intermediate shaft coupling
    • A worn intermediate shaft coupling
    • Tight steering column bearings
    • A sticking flow control valve
    • Insufficient pump pressure
    • Air in the power steering system
    • A low fluid level
    • Excessive internal pump leakage
    • Excessive internal rack and pinion leakage
    • Inspect for diagnostic trouble codes .