so i bought a z28 a couples weeks back 94 and im having a little troubles with the vents.. they wont blow out of the middle vents... the defroster and the bottom vents at your feet work but nothing comes out of the middle vents ... The relay works fine on all speeds and the blower motor still works so i was wantingto know what part i had to fix/replace i would like if you could also direct me too where i could most likely get one... thank you camaro lovers.....

 

Air doord msy not be working properly. The doors are vacuum operated.