* Key fob not working: This is the most common issue. Try these steps:
* Check the battery: Replace the battery in your key fob. This is often the culprit.
* Resync the key fob: The method for resyncing varies slightly by year. Consult your owner's manual for the specific procedure for your Grand Prix's year. It usually involves turning the ignition on and off a certain number of times while pressing buttons on the key fob.
* Spare key: Try a spare key fob if you have one. If the spare works, the problem is with your primary key fob.
* Alarm keeps going off: Figure out *why* the alarm is activating. Common causes:
* Door or trunk ajar: Make sure all doors and the trunk are securely closed.
* Hood ajar: Check the hood latch.
* Interior motion sensor: Sometimes a stray pet or object can trigger the alarm.
* Low battery: A dying car battery can sometimes trigger the alarm.
* Faulty sensor: A malfunctioning sensor (door, hood, etc.) could be causing false alarms. This requires professional diagnosis.
* Aftermarket alarm system: If you have an aftermarket alarm system installed, its reset procedure will be specific to that system's brand and model. Look for documentation that came with the alarm system or contact the installer.
* Security system is completely locked out: This is less common. You might need to have it diagnosed and potentially reprogrammed by a locksmith or dealership.
Crucially: Your owner's manual is your best resource. It will provide the specific steps for your Pontiac Grand Prix's year and model. The procedures can vary significantly between model years. If you don't have the manual, you can often find a digital version online by searching for "[Your Grand Prix's Year] Pontiac Grand Prix owner's manual."
