I have a 2002 Pontiac Grand Prix GTP (supercharged) 40th Anniversary Edition, and am having some rust repair done. I am having both the inner rockers, and outer rocker panels replaced on both sides. The 1997-2003 inner rockers are hard to come by, and am contemplating purchase of the 2004 GTP version of inner rockers, in hopes that these inner rockers are similar, and can be successfully used, and modified to work (if needed). I will post updates as I get rockers parts ordered, and work begins.