How do you reset theft deterrent on a Chevy Cobalt?

To reset the theft deterrent system on a Chevy Cobalt, first, 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 until the security light turns off. Afterward, turn the key to the "Off" position, then back to "On" for another 10 minutes. Repeat this process if necessary, and then try starting the vehicle.