How do you reset anti theft system in 1998 Sunfire?

To reset the anti-theft system in a 1998 Pontiac Sunfire, first, insert the key into the ignition and turn it to the "On" position without starting the engine. Leave it in this position for about 10 minutes until the security light turns off. Afterward, turn the key to the "Off" position, then try starting the vehicle. If the system remains active, you may need to repeat the process or consult a professional for further assistance.