I haven't seen any follow-up posts in the install section, so I'll just comment here.. If you search around the forums, you'll find some posts by me regarding an install of a GM steering wheel to Sony converter which worked splendidly with the original radio module. This was done in a Grand Prix. I've also done a GM sw to IR remote which also worked liked a charm. If you need more info on the 2 different converters that work, let me know.

Gregory