My driver's side sliding door lock started chattering and the first thing I did was take the panel off and tape a dollar bill on the door frame contacts. I was then able to manually lock the lock and leave it locked until I could fix it (OK, I couldn't fix it, because I was scared to get the can opener and open it up, but my brother the amazing mechanic didn't even slow down).
He opened up the tabs on the lock box and fiddled with the motor connection to the lock and got it to work and it's been working for almost a year. You can probably do this too, once you're over the idea that they don't want you to fix it. The thing is broken, so you might as well give it a try.
David