Ive had radio for about a year that I'm trying to put in now that I'm back in the states and have the right resources but I have never worked with double din h/u before. I have the GMOS-04 which I hope is the right one. But the wiring is just confusing me for some reason. Does anyone have a picture of their wiring they can post, or a link to a Step by step..I have an appointment with best buy to install it but I really don't want to drop $300 for something I just may be over looking. Thank you in advance guys.

 

The wires on your harness verses the ones with the radio should match together. I know mine did on both the headunits I have installed.