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 *** 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...