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I have a 2016 Chevy Silverado with a NG 2.5 HMI Module. Upon starting my car, my radio will turn on as normal. After 20 seconds, the power will flash to my radio, infotainment, and usbs. This causes the infotainment to restart. It continuously happens like this for 5-10 minutes before completely shutting off. Upon restarting my car, the entire process restarts. I tried hard resetting my car battery, and unplugging everything behind the infotainment and the HMI Module. Is there a way I can test what is actually causing the issue before I start replacing things at random?
What supplies power to the usb, infotainment, radio, etc. does the hmi module provide the power? Does the power come from somewhere else?
 
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