View Full Version : Aftermarket XM radio

07-23-2007, 12:32 PM
Hey kids -
Due to a mix up when ordering, my Sky Redline came without XM installed (although the radio is XM capable). I've found places online that sell an XM unit that plugs into the back of the factory radio - my question is this:

Do you know if the Onstar antenna on the car is also an XM radio antenna (it would have been had they installed XM at the factory), or do I need to add an XM antenna?

Thanks for any help!