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 1623 (ANTILOCK BRAKE SYSTEM)REPAIR INSTRUCTIONSWHEEL SPEED SENSOR REPLACEMENT - FRONTREMOVAL PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: The front wheel speed sensors and rings are integral with the hub and bearing assemblies.

If a speed sensor or a ring needs replacement, replace the entire hub and bearing assembly. Do not service the harness pigtail individually because the harness pigtail is part of the sensor. Refer to WHEEL BEARING/HUB REPLACEMENT - FRONT in Front Suspension.

Raise and support the vehicle on a suitable hoist. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
Remove the front tire and wheel assembly. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tire and Wheels.
Disconnect the front wheel speed sensor jumper harness electrical connector (1).

Fig 1: Disconnecting Front Wheel Speed Sensor Jumper Harness Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Remove the hub and bearing assembly (2). Refer to WHEEL BEARING/HUB REPLACEMENT - FRONT in Front Suspension.

Fig 2: View Of Hub And Bearing Assembly
Courtesy of GENERAL MOTORS CORP.

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.