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. I found SIR-GM1 for about $99 online. Thanks!

 

What year HHR do you have? It depends on the year. I know that I have a 07 model and I know that this wil not work 06 and up need this http://www.dogstarradios.com/dsr-pos-1.html

 

I do have an '07. ok, so you installed the SIR-GM3 your link listed?

 

The sir-gm1 will NOT work on any year hhr. The sir-gm3 will work but with the merger of sirius and xm soon im going to just wait.

 

Also the sir-gm3 has still yet to be released its only pre order