Yes...
Same for Jeep too

 

So if I read this thread right it will work also if that's the case it should work on my 2006 escalade xm plug. bcuz h2 and escalade have great stereos already.

 

Well put it this way....
It's $35 item, not $3500
If it doesnt work, your not broke (at least I'd hope not owning a Hummer)

I'd bet this would work in a lot of vehicles.
That being said, I'd buy now before Shwarttzy increases the price and advertises this works in other types of vehicles.