Hello. So my 1976 trans am is not blowing any air at all. Hot or cold air. the Car has a/c and it appears that all the controls are vacuum operated. i took off the vent cover on the passenger side and turned the fan on and noticed that the fan is blowing good. i can hear it too. I believe the problem is that one of the doors arent opening to allow the air out. I dont have air on any setting(Defroster, bi level, or floor). I tore the glove box out of the car and checked all the vacuum connections and they all seam to be sealed. i cant see any damage on any of them. i also took off one of the vacuum lines and noticed that it does have vacuum. Also, when i switch the heat to the "inside" setting the interior airflow entrance on the passenger side opens yet still no heat comes out. any ideas? thank you!