It looks like its going to be a headache to put a aftermarket stereo in so instead I`m wondering if it`s possible to swap a 2006 factory xm equiped stereo for the 2007 xm equiped stereo so that I can use the SIR GM1 sirius reciever unit which is supposed to work with an 06 stereo. Any ideas? Thx

 

the sir-gm1 will not work on any year hhr they are not class-2 bus they are gm lan

 

Ok,Thanks. Back to the drawing board.

 

I've scanned the posts for the aftermarket addition of satellite radio, specifically the SIR-GM1. I'm confused now, does everyone know for certain one way or the other if the SIR-GM1 will work? I have the headunit that appears to be XM ready with the CAT button, etc. Thanks!

 

I'd suggest a new thread, you'll get more responses.