I have been trying to find some info on this but everything I come across is from 2004-2005 and everyone says there is nothing. I know there is/was a supercharger kit for the 3.2L CTS so I know SOMEONE has to have tuning capabilities for the CTS. So, does anyone know of a company or software or something that would allow for custom tuning on a turbo/supercharged 3.2L?