GM Service Manual Online
For 1990-2009 cars only

Checks

Action

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

    â€¢ The intermediate shaft coupling is damaged or worn.
    â€¢ Tight steering column bearings
    â€¢ A sticking flow control valve
    â€¢ Insufficient pump pressure
    â€¢ Air in the power steering system
    â€¢ A low fluid level
    â€¢ Excessive internal pump leakage
    â€¢ Excessive internal rack and pinion leakage