Where is the 2003 chevy silverado idle air control valve located?

The 2003 Chevrolet Silverado has an idle air control valve, also called the IAC, mounted to the throttle body of the engine. The engine in this vehicle is fuel-injected, where the IAC communicates with the computer in order to control airflow. In turn, the motor gets smooth idling. If the valve has gone bad, You will experience symptoms such as rough or irregular idling, a check engine light coming on, and an unexpected stalling of the engine. If it is faulty, You will need to have it replaced. You can expect to pay between $56 and $195 for the part alone. If You want to have the service completed by a professional mechanic, You may need to pay between $80 and $174 for labor.