I know that the GMOS-04 has been talked about quite a bit, but i have a little input. I started the Install in my 2003 Chevy Tahoe with bose and onstar with a gmos-04 Version 2.3. I had nothing but problems : engine buzz, pops, hisses, the unit being muted randomly, and all other sorts of annoyances. Today i went on a mission to find a gmos-04 version 2.6. I found one at circuit city, wired it in, AND its perfect!!! Everything works flawlessly. So for anyoen with issues. Check your version and consider finding V 2.6. 2.6 is the newest version and its a far better product than previous versions. Thanks to everyone for all your help with my install. I am a very satisifed AVIC-D3 owner now.

yeah there is a recall from metra on these. anything made before 06/07 has all sorts of problems like you described.

The recall is only due to the plastic case they are housed in. The case has a notch on the inside which can crack a resister on the circuit board.