The entertainment system is turning on and off.
It is possible that you may have a faulty radio. This is pretty common with your vehicle. I wish I could offer a better explanation without inspecting your vehicle, but the radios can have many problems. The replacement radio would need to be programmed by a Chevy dealer in order to work. It's possible that your issue may be corrected by having the radio reprogrammed as well. I would ask for help from a Chevy dealer to check your entertainment system.
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