An ACDelco GM Original Equipment Exhaust Gas Recirculation (EGR) Valve Temperature Sensor reports the temperature of the exhaust gas flowing through the EGR valve, and is a GM-recommended replacement for your vehicle's original component. The signal is used by the engine control module to monitor the function of the EGR system. This original equipment EGR valve temperature sensor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.