Does anyone know if I can Use my Onstar antena for my Sirius Satilite radio? I don't care if the Onstar works anymore. And does anyone know if the onstar antena plugs into the back of the factory radio? I have a 05 Cobalt SS/SC

 

i highly doubt you can because the atena plug is totally diffrent, what you could do is replace the atena with with the satalite radio one that way you would be able to use the hole and mounting area.