An ACDelco GM Original Equipment Engine Oil Pressure Sensor provides an electrical oil pressure signal to the engine control module, and is a GM-recommended replacement for your vehicle's original component. It measures the oil pressure in your vehicle's engine and will alert you through the oil pressure gauge or warning lamp if the oil pressure falls below the specified pressure. This original equipment engine oil pressure sensor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.