Those of you that have installed XM in there GS's, the 3 months free is up and now I have to start paying, do you know where I find the unit or radio number so i can activate again. I know in my friend's TL, it says it on Channel 1, not sure about the GS though? thanks in advance.

 

I'm pretty sure you tune the radio to channel 0 and it displays the ID on the stereo. This is true for aftermarket radios and OEM integrated models. Channel 1 is the preview channel.

 

There is a white label on the control box in your trunk w/ the ESN. The control box is on the passenger side and hangs from the top. I lightened this photo up so you can see it better. It's just above the green arrow :

 

My control module doesn't hang down, i don't think. Its an 08...maybe they differ? Either way channel 0 has it.

 

Thanks guys, i'm going to check it out after i get out of work, thanks again.