GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

Steering wheel surges or jerks

    â€¢ Insufficient pump pressure
    â€¢ Low fluid level
    â€¢ Air in the power steering system
    â€¢ A sticking flow control valve
    â€¢ A sticking pinion spool valve
    â€¢ A worn belt
    â€¢ A belt that has the incorrect tension
    â€¢ Incorrect power steering fluid