http://www.installer.com/item/displa...hp?it=GM12-AUX

Does anyone know how that thing works?

It seems to me that its just tapping into an audio input on the HU's harness. Is that right?

Or does it do more than just 'tap' in?? Because if that's all, I can wire one of these for $3.

 

it uses gm lan to trick the HU into thinking it has the XM hooked up and runs the audio thru that

 

I figured that out, thanks


I did what I said in my first post and made my own.

I wrote up a how-to, but it doesn't look like it got approved yet.