I would be happy with this fix. The coax cable is what is bad so that should fix your issue. It carries the signal and the power to the system. It might be a little more work for them to separate the coax from the whole harness but ultimately way less chance of them messing something else up in the process. Also doing a whole harness could also induce other problems as way more needs to be disconnected and moved around.New update for today. Sounds like corporate taking the cheap route and only replacing the coax cable and not the total harness. They told me to have a good weekend and hopefully they can get the car done some time next week when the parts come in. Enjoy the caddy xt4. Haha. Based on everyone’s experience through this thread, means this is a waste of time.