Just went through this with 98 GTP. If you pull the covers off there will be these metal support frames underneath. If they are in very poor condition (like mine were and it sounds like yours are) you may not be able to put the cover back on. I had a local shop weld in rocker panel repair sections and have been half halfheartedly looking for replacement brackets / frames / ladders as I have seen the referred to with no luck in the re-pop market. Only way I have found to get them new is from GM but you have to buy the cover also at +$400 per side. So that leaves scrap yards. Have tried a few with no luck.
If anyone knows an after market sources for this, would be a big help.
