We have a 2018 Traverse that the sound has stopped working for a second time. The first time it came back after a day. This time it has been out for 3 weeks. Had the dealership look at it today after verifying that all the fuses were good. The dealership want to replace the ANC Module for $620. In the forum I have not seen this mentioned as a solution? The quote says”replace radio ACN module to re-evaluate concern”. This seems like an expensive step that is not guaranteed to solve the problem. Car is barely out of warranty. Was well under the first time it acted up. Any thoughts?