An ACDelco GM Original Equipment ABS Wheel Speed Sensor monitors and reports the individual wheel speeds to the Anti-lock Brake System (ABS) control module, and is a GM-recommended replacement for your vehicle's original component. The signals are used by the ABS module to determine wheel acceleration and deceleration, in order to modulate hydraulic pressure to prevent wheel lock-up. This original equipment ABS wheel speed sensor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.