2007 antenna

Please don't pick on me with this question, but where is my antenna located?  I do not have a vertical roof mounted nor a shark fin, which leads me to believe that it is an in-glass antenna.  Behind my rear-view mirror there is a "gridded area" with a 3 inch long tube fixture above it with an FCC ID code.  Is this it?  I am trying to install my XM with the XM SureConnect device (I know I should probably try an inline modulator for satellite, but I want to try this first).
 
Shannon

Hi, the 2006 model had the radio antenna built-in the backglass.  For the 2007 and up model it''s the little thing in the middle of the roof at the back like a shark fin, which integrated sirius antenna at it''s base.
 
Nic.