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 INSTRUCTIONSSTEERING GEAR THRUST SUPPORT REPLACEMENT - OFF VEHICLEINSTALLATION 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.

Lubricate the new o-ring seal.
If necessary, install the new o-ring seal onto the thrust bearing support.
Place J 45798 over the stub shaft. This will aid in assembly of the new thrust bearing support.

Fig 1: Using J 45798 To Install New Thrust Bearing Support
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: This thrust bearing support is preloaded onto the stub shaft. It will require a large effort to push on. Do not tap thrust bearing support into place with hammer or other object.

Press the thrust bearing support onto the stub shaft and into the gear housing. Remove J 45798 from the stub shaft.
Connect the adjuster nut assembly to the steering gear housing using J 42882 .

Fig 2: View Of Adjuster Nut Assembly, Steering Gear Housing & J 42882
Courtesy of GENERAL MOTORS CORP.
Adjust the thrust bearing support preload. Refer to Worm Thrust Bearing Preload Adjustment - Off Vehicle .

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.