* EGR Valve: This is the main component. It's a valve that controls the flow of exhaust gases back into the intake manifold.
* EGR Temperature Sensor: Monitors the temperature of the exhaust gas before it's recirculated.
* EGR Position Sensor (or DPFE Sensor - Differential Pressure Feedback Sensor): This sensor monitors how much exhaust gas is being recirculated. The Cavalier Z24 likely uses a DPFE sensor.
* Vacuum lines and related components: These connect the EGR valve to the intake manifold and the engine's vacuum system, controlling the valve's operation.
It's important to note that the exact location and appearance of these components might vary slightly depending on the specific engine configuration. A repair manual specific to your vehicle's year and engine (likely a 2.4L DOHC) would be the best resource for precise details.
