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 989 (POWER STEERING SYSTEM)REPAIR INSTRUCTIONSPOWER STEERING PULLEY REPLACEMENTINSTALLATION 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.

Place the power steering pump pulley on the end of the power steering pump shaft.
Install the power steering pump pulley using J 25033-C .

Fig 1: View Of Power Steering Pump Pulley Installer
Courtesy of GENERAL MOTORS CORP.
Ensure that the power steering pump pulley (1) is flush against the power steering pump shaft (2), with an allowable variance of 0.25 mm (0.010 in).

Fig 2: Checking Power Steering Pump Pulley Installed Depth
Courtesy of GENERAL MOTORS CORP.
Install the drive belt. Refer to Drive Belt Replacement , Drive Belt Replacement - Accessory (4.8L, 5.3L, and 6.0L Engines) , Drive Belt Replacement - Accessory (5.3L Engine w/RPO HP2) , Drive Belt Replacement or Drive Belt Replacement - Accessory in Engine Mechanical.
Install the upper fan shroud. Refer to Fan Shroud Replacement - Upper (W/O M74) , Fan Shroud Replacement - Upper (W/M74) or Fan Shroud Replacement - Upper (W/HP2) in Engine Cooling.

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.