Rear Wheel Speed Sensor, Gm Original Equipment By Acdelco 23483152. 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. Restores ABS function and performance caused by failed wheel speed sensor GM-recommended replacement part for your GM vehicle?s original factory component Offering the quality, reliability, and durability of GM OE Manufactured with GM Original Equipment specification for fit, form, and function