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Home >> Chevrolet >> 2009 >> TrailBlazer 6.0 H, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Repair Instructions >> Wheel Speed Sensor Replacement >> Removal Procedure

Removal Procedure

    Fig 1: View of Brake Rotor
    GM748559Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  3. Remove the brake rotor. Refer to Front Brake Rotor Replacement .
  4. Fig 2: Identifying Wheel Speed Sensor Wiring Harness
    GM886518Courtesy of GENERAL MOTORS CORP.
  5. Remove the wheel speed sensor wiring harness retainers.
  6. Fig 3: Locating Connector
    GM886517Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the wheel speed sensor electrical connector.
  8. Fig 4: Removing/Installing Sensor Mounting Screw
    GM777335Courtesy of GENERAL MOTORS CORP.
  9. Remove the wheel speed sensor bolt.
  10. Fig 5: Removing/Installing Speed Sensor
    GM748580Courtesy of GENERAL MOTORS CORP.
    CAUTION: Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device to pry the sensor out of the bore. Prying will cause the sensor body to break off in the bore.
    CAUTION: Do not attempt to remove the stainless steel shim from the bearing assembly. The shim is permanently attached. If the shim is damaged or bent, replace the bearing assembly. Failure to comply will result in diminished sensor and ABS performance.
    NOTE: The wheel speed sensor mounts into a bore that leads to the center of the sealed bearing. Use caution when cleaning or working around the bore. Do not contaminate the lubricant inside the sealed bearing. Failure to do so can lead to premature bearing failure.
  11. Remove wheel speed sensor from the hub and bearing assembly.