A lot of HHR owners have the correct head unit radio (has the "Cat" button) but did not get the XM option.
Now you can add XM to that radio, have the head unit display the song/artist/channel information, and use the head unit to control the XM tuner...ALL just like the factory installation.

Here are the folks selling the system:

http://stores.ebay.com/Integration-Solutions

No, I have no interest in the company, but last year a lot of members were looking for a way to add XM or Sirius using their head unit for control.

Have fun!

 

You might want to move this to the Audio and Video section of the Fourm.
Good news if it works.

 

If the radio is a Class II GM factory radio with a BAND button you can add the XM direct kit to it.

 

What about sirius? they will be one soon I here

 

Anyone know how much that kit would cost and the GM part#?
Thank's in advance.