I have a 1999 Chevy Tahoe with rear AC. Today after I got to work my AC no longer worked and I couldn't hear the blower motor kick on but my rear AC still works and blows hard. In my front AC/heat I've only had high but wasn't really a issue but now nothing in the front, only rear. On top of all that when my front AC did work it blew out of the vent, floor, and defrost at the same time. I took the mode actuator off and manually turned it and it shut the floor off which caused more air to come out of vents but still blew from vent and defrost. Does anyone have any ideas on what's going on with any of these issues?