So I actually got a reply back from LLJ on which harness to use based off the code for 4BWs. Here's the one that you need.
lljcustoms.com
I haven't purchased it. I ended up just cutting all 3 wires the day before they sent the reply back. I haven't drove the car since cutting the wires so I don't know if I have any feedback still or louder noise driving the car.
I'm still getting weird bass signals though. It's really reserved at first then gradually comes in after a few secs or adjust the volume. It then gets almost clipped when the volume gets half way up.
ANC bypass harness GMC vehicles W/ UQS,UQP,UQA,UQF RPO Code 2021-Up
This GMC Buick ANC bypass harness was designed for vehicles that have the factory Bose amplifier and an RPO code of UQA,UQF,UQS,UQP. This chevy ANC bypass harness is ideal for disabling and preventing feed back of the factory ANC system, when adding an aftermarket subwoofer. This harness works...
lljcustoms.com
I haven't purchased it. I ended up just cutting all 3 wires the day before they sent the reply back. I haven't drove the car since cutting the wires so I don't know if I have any feedback still or louder noise driving the car.
I'm still getting weird bass signals though. It's really reserved at first then gradually comes in after a few secs or adjust the volume. It then gets almost clipped when the volume gets half way up.
