GM Genuine Parts Keyless Entry Receivers are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These receivers collect a signal from the transmitter in your vehicle's keyless entry device. They take that signal and uses it to unlock or lock the doors. 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).