I have a 2013 GT with the Shaker Pro radio. The sound quality of this radio leaves a lot to be desired, so I decided that I would like to make some changes. Here's what I have planned:

1. Keep the stock head unit, door subs and trunk sub running off of the stock amps.
2. Replace the front and rear speakers with JL C2-570X speakers (running new speaker wire too).
3. Add JL XD 400/4 amp to power the front and rear speakers.
4. Add Audiocontrol DQDX interface with built in EQ.

I really don't want to tap into the factory wiring harness unless it's absolutely necessary. Does anyone make an adapter harness that I can buy to plug inline with the factory radio harness and allow me to install all of the aforementioned components?

 

This is what you need;

http://www.pac-audio.com/productDeta...&CategoryID=28

I just disconnected mine, that I used for 1 year. Now I'm putting in a new head unit. I'll sell you my old one for 20$ plus shipping if interested.

PM me and I can show you some pix and give you my paypal info.