I vaguely recall reading a post here, where someone had an issue with the seat shifting under him when making a 90 degree right or left turn. The poster may have included a TSB. I have searched and searched this forum and have come up empty. Does anybody know anything about this issue? I want to bring it in, and the GM has told me that if I can give him a TSB number, they can order the parts ahead of time, so I only would have to bring it in once.