GM Genuine Parts Parking Assist Alarm Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Parking Assist Alarm Sensors measure the distance between the vehicle and nearby objects. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). WARNING: Cancer and Reproductive Harm