GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

Steering Wheel Surges or Jerks

    â€¢ The hydraulic system is faulty. Perform the pressure test with the J 5176-D or the J 25323-B . Refer to Power Steering System Test .
    â€¢ The steering gear valve and pinion is sticking.
    â€¢ The steering gear valve and pinion is plugged.
    â€¢ The power steering belt is loose.
    â€¢ The power steering fluid is contaminated.
    â€¢ Air is in the power steering system.