GMT400 no defrost on drivers side

[squaredeal91]

Working on a 1995 chevy 1500. Has later style dash.
No defrost on drivers side. Barely comes out pass side.
Blend door above transmission hump by column, I believe is defrost blend door and is moving fully like it should. Center one moves when I change settings. Blend door by glove box (worst one!!) Doesn't seem to be working? I also notice air coming from floor vent when defrost is on. I'm thinking I'm losing defrost air to the floor.

My question is Anyone know off hand what the blend door by glove box operates? I'm hoping it's the floor. I've replaced one before but can't remember what it did. I just remembered how hard it was lol

 

[squaredeal91]

Went and looked at a 95 without the dash and got some answers. The far right blend door motor controls bottom flapper by blower motor. The one in the truck is stuck open. Removed motor and door closed. I'm noticing more air coming from the center vents than the defrost? That's interesting.

 

[squaredeal91]

Looking at the 95 without a dash I noticed this broken flapper. Wondering maybe this is the issue. Also the a/c hardly blows too. Also affected by this issue I believe. I'm thinking the same thing happened to the 95 I'm trying to fix. Looks like they need an air box or an air box rehab.