GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 156570  Size: SH
  1. Disconnect the electrical connector.
  2. Remove the nylon straps retaining the sensor wire to the brake line. Note the location of the straps.
  3. Remove the wheel speed sensor (1) from the bore.
  4. Remove the speed sensor retaining clip (2). The clip may come out with the wheel speed sensor or stay in the bore. If the sensor retaining clip is still functioning correctly, save it for reinstallation. If the sensor retaining clip is not functioning correctly, replace the sensor retaining clip.

Installation Procedure

Important: You may have to use the wire retainers from the old wheel speed sensor wire on the new sensor. Do not damage the new wire when installing the retainers.

    Important: When the wheel speed sensor is fully installed in the block bore, it contacts the tone ring which is attached to the wheel hub. Normal bearing play between the sensor tip and tone ring in the wheel hub will move the sensor tip away from the tone ring. This automatically establishes the proper air gap.


    Object Number: 156570  Size: SH
  1. Install the wheel speed sensor retaining clip (2) completely into the bore. The clip should stop at the retaining tabs. Insert the wheel speed sensor (1) into the clip. The wheel speed sensor should contact the tone ring.
  2. Secure the sensor wire to the brake line with a wire tie in the location noted during removal.
  3. Connect the electrical connector.