How do you replace an idle Air Control Valve on a 2003 Pontiac Aztek?

To replace the idle air control valve (IAC) on a 2003 Pontiac Aztek, first, disconnect the negative battery terminal to ensure safety. Locate the IAC valve on the throttle body, then remove the electrical connector and the mounting screws using the appropriate tools. Replace the old valve with the new one, secure it with the screws, and reconnect the electrical connector. Finally, reconnect the battery and start the engine to ensure proper operation.