* Incorrect Key: This is the most common reason. Try all your keys. If you only have one key, you'll need a new key made from the VIN at a locksmith or dealership. The system likely won't reset until the correct key is used.
* Low Battery: A weak battery can trigger the anti-theft system. Try jump-starting the car with a good battery and cables. After a successful jump start, try the key again.
* Aftermarket Alarm System: If you have an aftermarket alarm system installed, it might be interfering. Check the alarm's manual for troubleshooting or disarming instructions.
* Faulty Passlock System (for cars with this feature): The Passlock system is a common anti-theft system in 1998 Grand Ams. If the Passlock is malfunctioning it won't allow the car to start even with the correct key. This often requires professional help from a locksmith or mechanic specialized in automotive electronics. They can diagnose whether the Passlock module, ignition switch, or another component needs repair or replacement.
What NOT to do:
* Don't attempt to bypass the system: Attempting to bypass the anti-theft system can cause further damage and may void your warranty.
If you've tried the above and still have issues:
1. Consult your owner's manual: It might have specific troubleshooting steps for the anti-theft system.
2. Have it towed to a reputable mechanic or dealership: A professional can diagnose the problem accurately and provide the most effective solution, whether it's a simple key issue or a more complex electrical problem. Trying to fix it yourself without the proper knowledge could lead to further complications.
In short, there's no easy reset button. Focus on determining *why* the anti-theft system is activated first, and then proceed with the appropriate solution.
