i aswell have the issue. that unit does not work on my 23 silverado 2500. the back 2 usb in the back seat work but not this unit. dealer told me it was a bad unit and needed to be replaced but i just put a brand new one in and it still does not work. dealer told me the part is on back order.... i checked fuses aswell and made sure power is being sent to the unit from the plugs behind it, but i still have no carplay or power coming from the usb unit.