So just finished my install and it was the biggest pain ever. For those with the 2018 bose system you have to ignore 99% of this post. First of all the 2017 and 2018 are totally different. The 2018 with the bose has no remote wire going into the amp. You can get it from back the head unit but if you are like me and didn't want to touch the head unit you won't find a remote wire going into the amp. It uses dada signals. So you must use a LOC that has a remote signal built into it. That will control the signal off and on. Also for my model there isn't simply 1 wire to cut for the auto noise cancellation. There are 3 microphones with 2 wires each. The harness that controls this has 8 wires. 6 for the ANC and 2 others from what I can tell control the turn signal chime and the parking assist. Good news is there is a harness you can buy on Amazon for $25 bucks that actually works. It just connects the 2 wires leaving the 6 microphones off its 1000% worth the money. I called best buy, Crutchfield and my Chevy dealer and nobody had answers for me so i had to figure all this out on my own.