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When my SD card failed, the USB ports below still worked.


The lights flickering indicate there is a connection issue which may very well by why the SD Card is not working, in addition to the USB ports. I would check the manual to see which fuse supplies power to these ports and reseat and/or replace it.


If that doesn't fix it, then it will be harder to isolate. If you are still under warranty, it's Chevy's problem, let them fix it.


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