So I have a 2010 Chevrolet Avalanche LTZ that has navigation as well as OnStar but I am not currently connected to OnStar service. My current issue is I am not able to use bluetooth in my vehicle.I have read many post about how to get it to work, hold button on steering column for 2 seconds ,read the manual , turned off my iPhone for 30 minutes and then tried to pair it up again with bluetooth ,disconnect the battery for 30 minutes, ground the battery cables together (obviously not when connected to battery) , nothing I have tried will allow bluetooth to work. I have pressed the OnStar button the mirror, nothing happens, checked the left as well as the right door speaker, working normally. I actually pressed the Red Cross on the mirror and still nothing.Short of bringing it to the dealer, is there something else I can check ?Thanks