I'm going to put a Kenwood DNX5120 in my SS. I think I've ordered everything I need for the install. But I have one question. Does the GMOS-04 GM Onstar Digital Interface w/amp plug into the stock harness and then connect to the Kenwood or do I need a separete harness to mate the two?

 

that is the only harness you should need

 

yeah I just went to the axxess website and downloaded the instructions, but thanks anyway. It doesn't look like it will be that hard.

I'll post some pics when I get it in.

 

Quick question...the 04 is for the premium stereo...and the 03 is for the low-end stereo correct? (what USED to be installed before the aftermarket)

I'm talking about the GMOS harnesses.