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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Repair Instructions >> Wheel Speed Sensor Replacement - Rear >> Installation Procedure
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Installation Procedure

    Fig 1: Rear Wheel Speed Sensor & Shim
    GM913375Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If a shim was removed when the wheel speed sensor was removed, it must be reinstalled to ensure proper operation.
  1. Install the shim, if removed with the sensor, and the wheel speed sensor.
    2. NOTE: Refer to Fastener Notice .
  2. Install the wheel speed sensor retaining bolt.

    Tighten:  Tighten the bolt to 14 N.m (124 lb in).

  3. Connect the electrical connector.
  4. Lower the vehicle.
  5. Perform a low speed test to ensure the wheel speed sensor is functioning properly:
    1. Start the engine and allow it to idle.
    2. Check to see if the ABS indicator or the traction assist indicator remains illuminated.
    3. If the ABS indicator or the traction assist indicator remains illuminated, DO NOT proceed to drive the vehicle until it is diagnosed and repaired. Check the wheel speed sensor electrical connector to ensure it is not damaged and is installed properly. If the lamp remains illuminated, refer to Symptoms - Antilock Brake System .
    4. Select a smooth, dry, clean, and level road or large lot that is as free of traffic and obstacles as possible.
    5. Drive the vehicle and maintain a speed of at least 16 km/h (10 mph) for at least 5 seconds.
    6. Stop the vehicle and check to see if the ABS indicator or the traction assist indicator is illuminated.
    7. If an indicator is illuminated, refer to Diagnostic Starting Point - Antilock Brake System .
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