Need more info - key won't come out? Key won't turn? The first thing you can do is order a new tumbler, by taking your title to the dealer, should be under $100 and will be keyed to your car. You're going to need one in any case. Some people have actually hooked up electric sanders to the key to vibrate them. You can usually get it to work if you just keep playing with it. With the key out it's pretty easy to replace the tumbler. You'll need to make a specific tool for the job, which can be made from coat hanger.