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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1363 (POWER STEERING SYSTEM)REPAIR INSTRUCTIONSPOWER STEERING PUMP ASSEMBLEASSEMBLY PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Assembly Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Assembly Procedure
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Refer to Using Proper Power Steering Fluid Notice in Cautions and Notices.
  1. Apply fluid to a NEW pump shaft seal. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.
    2. Fig 1: Installing Pump Shaft Seal To Front Housing
    GM882820Courtesy of GENERAL MOTORS CORP.
  2. Align the pump shaft seal with the pump front housing (1). Verify the edge of the outer lip will be toward the inside of the pump.
  3. Use a press and a seal driver collar in order to install the shaft seal into the front housing. Press from the outside of the housing toward the inside.
    4. Fig 2: Applied Fluid To Pump Shaft And Housing
    GM882753Courtesy of GENERAL MOTORS CORP.
  4. Apply fluid to the pump shaft and to the front housing.
  5. Insert the pump shaft through the shaft seal and into the front housing.
  6. Apply fluid to a NEW large plate seal.
    7. Fig 3: Front Seal And Large Plate Seal
    GM881950Courtesy of GENERAL MOTORS CORP.
  7. Install the large plate seal (1) into the front housing (2).
    8. Fig 4: Small Plate Seal And Pump Plate
    GM881947Courtesy of GENERAL MOTORS CORP.
  8. Apply fluid to a NEW small plate seal (2).
  9. Install the small plate seal to the plate (1).
    10. Fig 5: Aligning Notch In Plate With Tab On Front Housing
    GM882767Courtesy of GENERAL MOTORS CORP.
  10. Align the notch in the plate (1) with the tab on the front housing (2). Verify the round holes in the plate are toward the shaft seal and the wide holes will be toward the rotor.
  11. Install the plate into the front housing.
    12. Fig 6: Front Housing And Pump Ring
    GM882788Courtesy of GENERAL MOTORS CORP.
  12. Align the notch in the pump ring with the tab on the front housing (2). Verify the stamping (1) will be toward the rotor.
  13. Install the pump ring into the front housing.
    14. Fig 7: Pump Rotor And Pump Vanes
    GM882795Courtesy of GENERAL MOTORS CORP.
  14. Align the rotor with the front housing. Verify the stamping (1) will be toward the rear housing.
  15. Install the rotor into the front housing.
  16. Apply fluid to the vanes (2).
  17. Align each vane with the rotor. Verify the rounded edge will be toward the rear housing.
  18. Install the 10 vanes into the rotor.
    19. Fig 8: Removing/Installing Retainer Ring
    GM882808Courtesy of GENERAL MOTORS CORP.
  19. Install a NEW pump shaft retainer ring.
  20. Apply fluid to the rear pump housing seal.
  21. Install the seal to the rear pump housing.
  22. Align the notches on the following components:
    • The front housing
    • The plate
    • The ring
    • The rotor
    • The rear housing
  23. Install the rear housing to the front housing.
    24. NOTE: Refer to Fastener Notice in Cautions and Notices.
  24. Install the 4 housing bolts.

    Tighten:  Tighten the bolts to 22 N.m (16.2 lb ft).

  25. Apply fluid to the sealing portion of the power steering pressure (PSP) switch.
  26. Install the PSP switch to the pump.

    Tighten:  Tighten the switch to 21 N.m (15.5 lb ft).

  27. Apply fluid to the flow control valve hole in the front housing.
  28. Apply fluid to the flow control valve spring.
  29. Install the spring to the pump.
  30. Apply fluid to the flow control valve.
  31. Install the valve to the pump.
  32. Apply fluid to a NEW pump fitting seal.
  33. Install the seal to the pump fitting.
  34. Install the pump fitting to the pump.

    Tighten:  Tighten the fitting to 69 N.m (50.9 lb ft).

  35. Apply fluid to a NEW inlet tube seal.
  36. Install the seal to the pump inlet tube.
  37. Install the inlet tube to the pump.
  38. Install the pump inlet tube bolt.

    Tighten:  Tighten the bolt to 12 N.m (106.2 lb in).

  39. Install the pump to the vehicle. Refer to Power Steering Pump Replacement .
RENDER: 1.0x

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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.