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Bleeding the Power Steering System: Notes

Tools Required

NOTE: If the power steering system has been serviced, an accurate fluid level reading cannot be obtained unless air is bled from the steering system. The air in the fluid may cause pump cavitation noise and may cause pump damage over a period of time.
NOTE: When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.
    IMPORTANT: Hoses touching the frame, body, or engine may cause system noise.
  1. Verify that the hoses do not touch any other part of the vehicle.
    2. IMPORTANT: Loose connections may not leak, but could allow air into the steering system.
  2. Verify that all hose connections are tight.
    3. Fig 1: Identifying FULL COLD Level On Reservoir Cap
    GM443644Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Maintain the fluid level throughout the bleed procedure.
  3. Remove the pump reservoir cap.
    4. IMPORTANT: Use clean, new power steering fluid only.
  4. Fill the pump reservoir with fluid to the FULL COLD level.
    5. Fig 2: Bleeding Power Steering System Using J 43485 & J 35555
    GM443646Courtesy of GENERAL MOTORS CORP.
  5. Attach the J 43485  to the J 35555  or equivalent. See Special Tools .
  6. Place the J 43485  on or in the pump reservoir filler neck. See Special Tools .
  7. Apply a vacuum of 68 kPa (20 in Hg) maximum.
  8. Wait 5 minutes.

    Typical vacuum drop is 7-10 kPa (2-3 in Hg). If the vacuum does not remain steady, refer to Excessive Vacuum Drop Diagnosis .

  9. Remove the J 43485  and the J 35555  . See Special Tools .
  10. Reinstall the pump reservoir cap.
  11. Start the engine. Allow the engine to idle.
  12. Turn off the engine.
  13. Verify the fluid level. Repeat steps 11-13 until the fluid stabilizes.
    14. IMPORTANT: Do not turn steering wheel to lock.
  14. Start the engine. Allow the engine to idle.
  15. Turn the steering wheel 180-360 degrees in both directions 5 times.
  16. Switch the ignition off.
  17. Verify the fluid level.
    18. Fig 3: Identifying FULL COLD Level On Reservoir Cap
    GM443644Courtesy of GENERAL MOTORS CORP.
  18. Remove the pump reservoir cap.
    19. Fig 4: Bleeding Power Steering System Using J 43485 & J 35555
    GM443646Courtesy of GENERAL MOTORS CORP.
  19. Attach the J 43485  to the J 35555  or equivalent. See Special Tools .
  20. Place the J 43485  on or in the pump reservoir filler neck. See Special Tools .
  21. Apply a vacuum of 68 kPa (20 in Hg) maximum.
  22. Wait 5 minutes.
  23. Remove the J 43485  and the J 35555  . See Special Tools .
  24. Verify the fluid level.
    25. Fig 5: View Of Pump Reservoir Cap
    GM443656Courtesy of GENERAL MOTORS CORP.
  25. Reinstall the pump reservoir cap.

Tools Required

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