Just purchased 07 H3 w/Monsoon system. Took to local audio shop and they installed my Pioneer Avic700bt w/ the GMOS-04. Once done they couldn't get the onstar to work. When you hit the onstar it justs mutes the radio and makes no connection. If you remove and plug up existing radio OnStar works. Anybody have any ideas, they are researching and supposed to call when done? Thanks for the help