For a few years our 08 Grand Prix has a clunk/popping sound when going over bumps at times. Started after she hit a hug pot hole. I have replaced lower control arms, tie rods, and sway bar links and all needed to be replaced but none fixed the issue. When jacking up the car this weekend I think I found the problem! The inner fender in the drivers side behind the strut is hitting the strut. It is bent down a little. I can not find a mounting point to get it so it does not hit the strut over heavy bumps. I have searched and I can not find anyone with this issue. Thought I would post in case I am missing something in a search.