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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 768 (POWER STEERING SYSTEM)POWER STEERING FLUID INSPECTIONFLUID PRESSURE INSPECTION
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Fluid pressure Inspection

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Fluid pressure Inspection
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Set the SSTs  so that the valve of the SST  faces toward the gear housing side as shown in the figure.
    Fig 1: Installation Position Of Special Service Tool
    G00975754Courtesy of MAZDA MOTORS CORP.
  2. Disconnect the oil pump side joint of the pressure hose, connect the SSTs  set in the Step 1.
    1. Tightening torque 29.4-44.1 N.m {3.00-4.49 kgf.m, 21.6-32.5 ft.lbf} 
    Fig 2: Disconnecting Oil Pump Side Joint Of Pressure Hose & Connecting Special Tool
    G00975755Courtesy of MAZDA MOTORS CORP.
  3. Bleed the air from the system.
  4. Open the gauge valve fully.
  5. Start the engine, turn the steering wheel to the left and right to raise the power steering fluid to the appropriate temperature (50-60 °C {122-140 °F}  ).
  6. Close the gauge valve fully.
  7. Increase the engine speed to 1,000-1,500 rpm  and measure the fluid pressure generated at the oil pump.
    • If it is less than the specification, replace the oil pump as a single unit.
    Fig 3: Identifying Gauge & Completely Closed Valve
    G00975756Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

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.