How do i reset the anti theft on my 2007 Pontiac grand prix?

To reset the anti-theft system on your 2007 Pontiac Grand Prix, insert your 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. Then, turn the key to the "Off" position and try starting the vehicle. If the problem persists, consult your owner’s manual or a professional for further assistance.