Envoy 4WD L6-4.2L VIN S (2003)
Wheel Speed Sensor: Service and Repair
Wheel Speed Sensor Replacement
Removal Procedure
Caution: Refer to Brake Dust Caution in Service Precautions.
1. Raise the vehicle.
2. Remove tire and wheel.
3. Remove brake caliper.
4. Remove the hub and rotor.
5. Remove wheel speed sensor mounting clip on the control arm.
6. Remove wheel speed sensor mounting clip on the frame rail.
7. Disconnect the wheel speed sensor electrical connector (2).
8. Remove the sensor mounting screw (5).
Important: 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.
Notice: Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device. Prying will cause the sensor
body to break off in the bore.
Notice: 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.
9. Remove wheel speed sensor from hub and bearing assembly.
Installation Procedure
Notice: Refer to Fastener Notice in Service Precautions.
Important: The new speed sensor will have a new O-ring. Dispose of the old O-ring. Lubricate the new O-ring lightly with bearing grease prior to
installation. You may also lubricate the sensor just above and below the new O-ring. DO NOT lubricate the bore.
