What kills me is that Gm and everyone else says we can't do this upgrade. the hummers and cads have it easy for they have the amp and mic already install. We avalanchers have to rewire the amp and add the mic and then get it programed. what a pain. if the truck or car has the upgraded amp in it already the it is easy. here is post on the Avalanche site.
http://www.chevyavalanchefanclub.com...threadid=21297
I am planning on do a how to do for us since i was the first to do the upgrade in a AV.
No one else could do it. Now one other AV has it done.