How do you reset the theft system in a 2007 Chevy Cobalt LT?

To reset the theft system in a 2007 Chevy Cobalt LT, first, ensure that you have the correct ignition key. Insert the key into the ignition and turn it to the "On" position without starting the engine. Leave the key in this position for about 10 minutes; the security light should turn off, indicating the system has been reset. Finally, turn the key off and attempt to start the vehicle.