To reset the security light on a 1997 Oldsmobile, 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. Then, turn the key back to the "OFF" position and start the engine. If the security light remains on or the vehicle won't start, you may need to consult a professional for further diagnosis.
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