ACDelco GM Original Equipment 12574339 Fuel Injection Pressure Regulator Kit with Regulator, Seal, and Bolt;

An ACDelco GM Original Equipment Fuel Injection Pressure Regulator is a mechanical valve that controls the fuel pressure in the fuel injector rail, and is a GM-recommended replacement for your vehicle’s original component. The spring-loaded valve returns excess fuel back to the fuel tank. This original equipment fuel injection pressure regulator has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.