1987 r10 ac problem

[Mr.Chevy]

Hi
The ac on my truck works great except it only blows put of the feet vent does anyone know if there is a little motor that switches it to the defroster and dash vents or what the problem might be?

 

[Georgeb]

It's all vacuum operated. here are some threads that may help:

http://www.gmsquarebody.com/forum/showthread.php?t=5985&highlight=vent+controls

http://www.gmsquarebody.com/forum/showthread.php?t=4809&highlight=vent+controls&page=11

 

[glockholiday]

Yes, I'm not exactly sure where. I'd start behind the glove box.

 

[Mr.Chevy]

Ok thank yall alot for the info!!