How do you reset security system on a Oldsmobile aurora 1999?

To reset the security system on a 1999 Oldsmobile Aurora, first ensure that the vehicle is in the "Run" position without starting the engine. Then, leave the ignition on for approximately 10 minutes until the security light turns off. Once it does, turn the ignition off for a few seconds and then try starting the vehicle. If the issue persists, you may need to consult the owner's manual or a professional for further assistance.