GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

    â€¢ Hard steering
    â€¢ Lack of assist
    â€¢ A Magnasteerâ„¢ system malfunction.
    â€¢ A damaged intermediate shaft coupling
    â€¢ A worn intermediate shaft coupling
    â€¢ Tight steering column bearings
    â€¢ A sticking flow control valve
    â€¢ Insufficient pump pressure
    â€¢ Air in the power steering system
    â€¢ Low fluid level
    â€¢ Excessive internal pump leakage
    â€¢ Excessive internal rack and pinion leakage