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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 584 (ANTI-LOCK 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 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 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 .

  1. Raise and support the vehicle on a suitable hoist.
  2. Remove the front tire and wheel assembly.
  3. Disconnect the front wheel speed sensor jumper harness electrical connector (1).
    Fig 1: Wheel Speed Sensor Jumper Harness Electrical Connector
    G01721003Courtesy of GENERAL MOTORS CORP.
  4. Remove the hub and bearing assembly (2). Refer to WHEEL BEARING/HUB REPLACEMENT - FRONT .
Fig 2: Wheel Hub/Bearing Assembly
G01721004Courtesy 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.