Hi Shelby,
Unfortunately, I cannot find any information on this specific feature but it appears others have found that this issue is caused by the tow bar indicator system. In other words, when you have a trailer plugged in and the indicator lights on the trailer are operating you will hear this beeping. The beeping means the lights on the trailer are working. If you don't have a trailer hooked up and it is doing it then that means that there is water in the connectors or wiring for this system. When water gets in this system, it shorts it out and makes it think there is a trailer hooked up.
Please let me know if you have any other questions. Thanks
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Thursday, June 13th, 2019 AT 1:26 PM