I bought the fiberglass fender from Chevy Duty. The fit was not good. The "point" of the fender was rounded off and didn't come close to matching the sharper lines of the original metal. Chevy Duty was very understanding and sent me a metal one at no cost. They didn't even want the fiberglass fender back. I guess that the shipping wasn't worth it. The metal fender fit much better than the fiberglass fender but not as good as the original. It's to bad because the fiberglass fender was stronger.
