You have a thread going already on this, I posted a response there already saying to put up a thread at DIYMA there is a guy there that does custom harnesses for all GM vehicles with the Bose setup. I don't know his name but others there do. He does really nice custom work for that style of system.
hello, I am wanting to hook up my eclipse EA4100 to my Focal K2 6.5 coaxials in my 2017 GMC sierra they are connected now but have no ass at all when it comes to SQ my truck has the factory Bose system and I don't want to have it hacked up I'm sure with all the knowledge out there someone...