That post reminded me of something. I'd order a new VIN-coded lock cylinder from the dealer FIRST, before doing ANYTHING else. It will come with a new laser-cut, steel key. Sometimes just a new, fresh key will get the old tumbler to turn one last time. And you need the new tumbler anyway, so you should attempt this BEFORE spending 3-5 hours cutting, grinding, and drilling the old lock ass'y out. (Or if a shop is doing it, think of $300-$500 labor you might save.)