I own a 2005 GXP and have experiences clunking noised from my steering column (began noticing about 22K miles). The dealer said it was a design defect and that a "grease kit" would fix the problem. Needless to say that "band aid" approach did not work and now the car is back for the 2nd time to fix the problem. Now the dealer is going to relace the steering box assembly which is suppose to be a new design. Funny this wasn't done the first time. By the way, I had the same issue on my 2004 GTP which I had traded-in for the GXP.. Beside the sterring issue, there has been no other problems. Fingers crossed!