Hey guys, new here and need a couple questions answered. I bought an AVIC D3 used, but in excellent condition from a member off of a GM Truck forum. It came with a PAC Audio OS-4 vehicle specific wiring harness (all wired in) for the new body style GM trucks (07-10).
I've read threads on the bypass, watched videos, and searched and haven't quite found what I need until I came across the sticky on here about the bypass and it was said that you NEED the RCA harness to perform this. This harness wasn't included with the unit. Otherwise I looked and couldn't find any yellow/black wire on the
