GM Service Manual Online
For 1990-2009 cars only
  1. Raise the front end of the vehicle off the ground until the tires and wheels turn freely.
  2. Remove the fluid return hose at the power steering pump inlet connector
  3. Plug the inlet connector port on the pump.
  4. Place a large container under the fluid return hose in order to catch the draining fluid.
  5. Run the engine at idle while an assistant fills the reservoir with new power steering fluid.
  6. Turn the wheel back and forth, fully to the left and fully to the right. Do not hold the wheel at a stop or a sudden overflow from the fluid reservoir may occur.
  7. Install all of the pipes and the hoses.
  8. Fill the system with new power steering fluid. Refer to Fluid and Lubricant Recommendations in Manitenance and Lubrication.
  9. Bleed the system. Refer to Power Steering System Bleeding .
  10. Operate the engine for approximately 15 minutes.
  11. Remove the pump return hose at the pump outlet. Plug the connection on the pump.
  12. Refill the reservoir. Inspect the draining fluid for contamination.
  13. If foreign materials are still found, replace all of the hoses. Refer to Power Steering Pressure Pipe/Hose Replacement and Power Steering Return Hose Replacement .
  14. Disassemble and clean the power steering components. Replace the components as necessary.
  15. Do not reuse any drained power steering fluid.