Welcome back:
Without knowing the specifics, that's a tough one to answer. What I suggest is this. Take and put a socket on the bolt with a good breaker bar. Smack it with a dead blow hammer in the counter clockwise directions a few good times. It should break loose. If it refuses to, then it could be a reverse thread, but to be honest, that would be an odd one.
Let me know if it comes loose for you.
Take care,
Joe
Tuesday, September 17th, 2019 AT 7:41 PM