Welcome to the forum!
You should try searching the Grand Am forum to see if others have posted of similar concerns. It might be a common issue with a common fix. If you search and don't find anything, then you might want to move this thread to that forum, but please use a meaningful, descriptive title per the
forum guidelines you agreed to when you registered on for an account.
Your '99 might have electric power assist steering and maybe the electrical connector came unplugged or the fuse blew.
-Rod