The right seatback on the '97 Deville I just sold would on rare occassions move to the full forward position by itself with no input. It has not happened in about 6 months so I forgot about it. I just sold the car and wouldn't you know it, it happened again. I feel bad about it and would like to help the guy correct the problem. Has anyone expirienced this before? Off the top of my head I am thinking maybe a relay under the seat (if there is one) or a bad seat switch.