I purchased my 2016 2500 LTZ Duramax in February. Loved the idea of having the usb ports since my phone wasn't compatible with the wireless charging pad. Ever since I got it, I will plug my Galaxy S5 mini into a usb port and it will start charging for 2 seconds and then it will stop charging for 2 seconds. It stays on this cycle until I unplug it, simply because it isn't charging my phone. I don't want to transfer music or anything else because I do that via Bluetooth. It does the same thing with any of the usb ports that I try. Are they really not made for just charging, or is there something I am missing?