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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 989 (POWER STEERING SYSTEM)REPAIR INSTRUCTIONSPOWER STEERING PUMP REPLACEMENT (8.1L)INSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. Install the rear bracket to the power steering pump.

    Tighten:  Tighten the rear bracket retaining nuts to 50 N.m (37 lb ft).

  2. Install the power steering pump to the vehicle.
    3. Fig 1: View Of Power Steering Pressure Hose & Power Steering Pump
    GM898604Courtesy of GENERAL MOTORS CORP.
  3. Install the pressure hose (2) to the power steering pump.

    Tighten:  Tighten the hose fitting to 28 N.m (20 lb ft).

    4. Fig 2: View Of Power Steering Return Hoses, Clamps & Power Steering Pump
    GM898607Courtesy of GENERAL MOTORS CORP.
  4. Install the power steering return hoses (2,4) and retaining clamps to the power steering pump.
    5. Fig 3: Installing Bolts To The Rear Of The Power Steering Pump (8.1L)
    GM656330Courtesy of GENERAL MOTORS CORP.
  5. Install the bolts (1) to the rear of the power steering pump.

    Tighten:  Tighten the rear bolts to 50 N.m (37 lb ft).

  6. Install the power steering pump mounting bracket bolts.

    Tighten:  Tighten the mounting bracket bolts to 50 N.m (37 lb ft).

    7. Fig 4: Installing Bolts To The Front Of The Pump (8.1L)
    GM656333Courtesy of GENERAL MOTORS CORP.
  7. Install the bolts (2) to the front of the pump.

    Tighten:  Tighten the power steering pump retaining bolts to 50 N.m (37 lb ft).

    8. Fig 5: Installing Filler Neck To The Power Steering Pump (8.1L)
    GM748676Courtesy of GENERAL MOTORS CORP.
  8. Install the filler neck to the power steering pump.
  9. Install the nut (1) and clamp (3) retaining the filler neck to the power steering pump.

    Tighten:  Tighten the filler neck retaining nut to 25 N.m (18 lb ft).

  10. Fill and bleed the power steering system. Refer to Bleeding the Power Steering System .
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • 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.