ACDelco GM Original Equipment Fuel Injection Throttle Bodies are GM-recommended replacements for your vehicle's original components. They are located on the intake manifold, and contain the throttle plate(s) that control the air entering the engine. The throttle body also houses the fuel injector(s) on Throttle Body Injection (TBI) or Central Fuel Injection (CFI) systems. These original equipment fuel injection throttle bodies have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.