Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 768 (POWER STEERING SYSTEM)ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) CONTROL MODULE CONFIGURATION
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Electro Hydraulic Power Assist Steering (EHPAS) Control Module Configuration
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Electro Hydraulic Power Assist Steering (EHPAS) Control Module Configuration
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.
- Turn the ignition switch off.
- Connect the WDS or equivalent to the DLC-2.
- Input the vehicle information following the directions on the screen of the WDS or equivalent.
- Select "Module Programming" from the WDS or equivalent menu.
- Select "Programmable Module Installation".
- Select "EPS".
- Clear DTCs using the WDS or equivalent, the verify that there is no DTC present.
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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.