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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: 

  1. Attach J 43485  to J 35555  or equivalent.
  2. Place J 43485  on or in the pump reservoir filler neck.
  3. Apply a vacuum of 68 kPa (20 in Hg) maximum.
  4. 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 .

    Fig 2: Bleeding Power Steering System
    G01720080Courtesy of GENERAL MOTORS CORP.
  5. Remove the J 43485  and the J 35555  .
  6. Reinstall the pump reservoir cap.
  7. Start the engine. Allow the engine to idle.
  8. Turn OFF the engine.
  9. Verify the fluid level. Repeat steps  810 until the fluid stabilizes.
    CAUTION: DO NOT turn the steering wheel to LOCK.
  10. Start the engine. Allow the engine to idle.
  11. Turn the steering wheel 180-360 degrees in both directions 5 times.
  12. Turn OFF the ignition.
  13. Verify the fluid level.
  14. Remove the pump reservoir cap.
    Fig 3: Pump Reservoir Level Markings
    G01720081Courtesy of GENERAL MOTORS CORP.
  15. Attach J 43485  to J 35555  or equivalent.
  16. Place J 43485  on or in the pump reservoir filler neck.
  17. Apply a vacuum of 68 kPa (20 in Hg) maximum.
  18. Wait 5 minutes.
  19. Remove J 43485  and J 35555  .
  20. Verify the fluid level.
    Fig 4: Bleeding Power Steering System
    G01720082Courtesy of GENERAL MOTORS CORP.
  21. Reinstall the pump reservoir cap.
Fig 5: Pump Reservoir Cap
G01720083Courtesy of GENERAL MOTORS CORP.