I have a 2023 Silverado 3500HD High Country. A few days ago I went out to move my 5th wheel and found that I do not have any power at the 7 pin connector. I checked and changed the 30A fuse in the fuse box. I have a trailer wire tester that shows all other connections in the 7 pin are working (even the trailer breaks). I have two 7 pin connectors on the truck one in the bed and one on the bumper. Neither of these have the 12v+ power for charging. I have power at the engine compartment fuse box, volt meter reading 12.7v. I am at my wits end with this thing. I am hoping that I can take care of this issue without taking it to the dealer but if not I will have to break down and take it in. Does anyone have any ideas on this issue?