Need help with WX7 Y cable location.

[azk19]

Hi everyone, I just got my 2015 Tahoe PPV and I have questions about WX7 package.
My front speakers doesn’t work, I know about Y cable which I need to remove. But I already took whole dash a part and not able to locate it.
Any help appreciated.

 

[guywith2015LT]

hey were you able to ever find it? I bought a same car and have same wiring harness lying on the floor. I got 0 sound from my car, no audio, chimes, horn, the 12v adapter plug won't work and the household outlet either. Would really appreciate if you could help me.