Does anyone have any information about later model cars as far as how to access the OBD to get codes? also, does anyone have a source for Code interpretation? I have a Cadillac STS and you access the OBD by pressing two buttons on the AC control panel, then the LCD panel becomes the OBD display, which cycles through the codes and tells you if they are Current or History. Also, someone kindly posted an interpretation manual on one of the Cadillac boards. I have seen some threads about building/buying tools to access the codes on machines just slightly older than mine, but have not seen anything for newer machines.