Hello, My name is Don and I live in BC Canada. I bought an 06 CTS 3.6 with 3000 miles last month and have been enjoying it very much. So far the only problem has been the dreaded pinion leak. The car was a salvage rebuilt that I paid $17k for and has no trace of ever being damaged. However there is no warranty so the pininion leak cost me about $150 to fix ( a new seal and 1.5 hrs labour) good as new! I also added a HID kit to the headlights and blew a ballast within a week. Now that I have taken the bumper off twice its not such a big deal. Thanks for the info I picked up here. Looking forward to sharing idea's if I can.