* With your key: The most obvious method! Make sure you're using the correct key and that you're inserting it fully into the lock cylinder on the driver's side door or the trunk.
* With the remote key fob: If your key fob has a button to unlock the doors, press it. Make sure the battery in your fob is working. If it's not unlocking, try replacing the battery.
* Spare key: If you have a spare key, use that.
* Using the key in the ignition: Some models might allow you to unlock the doors by inserting the key into the ignition and turning it.
* If you're locked out:
* Roadside assistance: Call your roadside assistance provider (if you have one) or a locksmith. This is generally the safest and most efficient option.
* Locksmith: A locksmith is equipped to unlock your car without damaging it. This is your best option if you don't have any keys.
* GM OnStar (if equipped): If your Cobalt has OnStar, you might be able to use the service to unlock your car remotely. Check your OnStar manual or website for instructions.
Important Considerations:
* Avoid damaging your car: Don't try to force the locks or break a window. This will cause unnecessary damage and expense.
* Security: Be cautious about who you trust with access to your vehicle. Only use reputable locksmiths or roadside assistance services.
If none of the above methods work, it's best to contact a professional.
