I have zero experience with anything but an 04, but isn't the procedure much easier in 06+ radios since you can do an easy mod into the CD changer connector instead?
No issues like that for me. Its consistent on AUX, CD or the radio.i did this and its works great but i have a custom sub in my car and when i hook up the media device the base almost doubles from my sub. is anyone else having this problem?
I install the HU on top of dash board like you. Did you power the HU by connecting to the battery directly?I could never get this method to work in my 04, so that's why I figured out an alternate method:
In the end though, I am glad to have just installed a new head unit up top and left the stock stereo in the dash below. I did leave power going to it, but no audio signal wires remain connected.