2010 Chevy express 3500 No front or rear heat or air

I just re-read the question, and in the morning light, it isn't as clear as it was late last night. Neither the front or rear system works in any way. We set it to outside air as we drove to see if it was just the blowers, but neither hear or air worked that way either. We hope it is a fuse, or a plug somewhere, but fear a more significant electronic piece. He had the "blower motor resistor" problems that are so common with Chevy trucks, and fixed the offending wire, but did not have to replace the resistor or motor. Would the front blower or resistor being out make the rear system not work too?

Did you find out the problem I'm haveing the same problem