* Wait: Sometimes, a temporary electrical glitch causes the light. Try waiting 10-15 minutes and then trying again. This allows the system to reset.
* Key: Ensure you're using the correct original key. A duplicate key that wasn't properly programmed to the car's system won't work. A worn key can also cause problems.
* Key Position: Make sure you're following the correct ignition key procedure. Some anti-theft systems require a specific sequence of key turns or a period of time in the "on" position before cranking.
* Battery: A weak battery can sometimes cause the security system to act up. Try jump-starting the car with a good battery and cables.
* Professional Help: If none of the above works, you'll likely need professional help. This could involve:
* PassLock reprogramming: A locksmith or Buick dealership can reprogram your keys to the vehicle's system if they're not recognized.
* Security system repair: There might be a fault in the anti-theft system itself requiring diagnosis and repair. This often involves a scan tool to read diagnostic trouble codes (DTCs).
Important Note: Avoid repeatedly trying to start the car. Too many attempts can drain the battery further and potentially damage the starter.
