Tip - How to Replace an ABS Wheel Sensor in a Chevy Impala | eHow

The Chevy Impala has an anti-lock braking system (ABS) wheel sensor on each wheel that provides the wheel speed to the ABS controller. The ABS controller then uses that information to determine the amount of braking force to apply to that wheel. You may need to replace the ABS wheel sensor if it becomes clogged with debris, especially metallic...