Question for the experienced Wingers...I installed my GPS without issue, works great, but now I'd really like to add my satelite receiver...I've read mixed opinions regarding the need for a "ground loop" or "radio interface"? I have an '08 premium sound, and plan on running the audio thru the Auxilary...is it necessary, and if so, is it something a non-mechanicaly inclined individual and install?

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