ACDelco GM Original Equipment ABS Wheel Speed Sensors are located at each wheel, monitoring the rotation of each wheel, and are GM-recommended replacements for your vehicle's original components. The sensor provides this speed information to the antilock brake control module for the antilock braking function. These sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Warning: Automobile parts, accessories and ancillary chemicals contain chemicals known to the state of California to cause cancer, birth defects and other reproductive harm. Wash hands after using.