I have owned almost every make of GM vehicles, but am converted to Cadillac many times over, when I bought my first 03 CTS. Today I own an 09 CTS4 that is luxurious and fun to drive. I had a problem with handling on left turns at high speed on highway driving that was "driving" me crazy. I first thought it was a tire problem, since the problem became quite noticeable when I installed a new set of Michelin tires. After two times returning the vehicle to the tire shop that installed the tires. I went online (Alldata Pro) to look at TSB's, and found an article on this very thing. It was a safety recall which included a "clunking" noise in the rear, where a tie rod may work loose, and cause unsafe handling, which described exactly what I was experiencing. Turns out that the safety recall had already been done, but I finally took the vehicle to a Cadillac dealer in Batesville, AR, and they fixed the handling problem, but I still have a clunking in the right rear of the vehicle. Anybody have suggestions?