95 Riviera Body Work

I have a 95 Riviera that needs body work on the right rear fender. I was wondering if anyone could tell me what kind of work it is to replace this fender entirely. I do not know if it is bolted, welded, both or if it is somehow attacked to the unibody. From what I can tell it isn't, but before I dive into this job head first I was wondering if I could get some answers on how to go about removing it if I can.