I have been having a chime going off in the van for some time now. I can silence it, but it will come back again and again. Every time I slow down or turn or stop, it will start again. I've checked everything I could think of to silence it for good but it just won't quit. It's not the fuel chime or the seat belt chime, and it's not any of the warning lights. It's like trying to calm a colicky kid, it just keeps coming back. Any ideas?