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I have a 2016 Sierra and I noticed my microphone quit working when connected to with my phone. Not sure if it happened at the same time but I also noticed my OnStar, navigation, and compass are also not working. I found several threads on here and everyone says it's the shark fin. I replaced the shark fin today and nothing changed. I did not notice any traces of water in the headline. I checked all the fuses and disconnected the battery for an hour. Any suggestions where I should look next?

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