I have a 2008 CTS w/ just under 40k miles on the odo. The driver side rear squeaks relentlessly. Started a few months ago. I pulled the wheel off and lubed all the fittings I could see on that side. SUCCESS!! NO MORE SQUEAK!! That lasted about three months. Now it is back, and I tried same drill with no luck. I am guessing I got lucky the first time and just lubed the right spot. It squeaks like crazy. It squeaks when I get in and out of the driver seat. It squeaks while driving slow. It squeaks while driving fast. Anyone else experienced this? Anyone know what the issue is, or how to resolve it? Any help, or input is appreciated.