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 630 (POWER STEERING SYSTEM)REPAIR INSTRUCTIONSPOWER STEERING PUMP FLOW CONTROL VALVE ACTUATOR REPLACEMENT - ON VEHICLEDISASSEMBLY PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Disassembly Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Disassembly Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Remove the electrical connector from the variable assist steering actuator (1).
Remove pump assembly from the vehicle, if the variable assist steering actuator (1) is not accessible. Refer to Power Steering Pump Replacement (4.8L, 5.3L & 6.0L Engines) , Power Steering Pump Replacement (6.6L Diesel) , Power Steering Pump Replacement (8.1L), or Power Steering Pump Replacement (4.3L) .
Remove the retaining ring (2) from the variable assist steering actuator (1).

Fig 1: Variable Assist Steering Actuator
Courtesy of GENERAL MOTORS CORP.

Important: Note the orientation of the variable assist steering actuator discharge fitting.
Remove the variable assist steering actuator (1).
Remove the O-ring seal from the variable assist steering actuator

RENDER: 1.0x

NO RELATED

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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.