brandon9598

iTrader: (1)

So a couple of weeks ago, my air stopped blowing from every setting but the defrost setting. it blows hot air out of the defrost vents fine. but when i turn the air on cold (it used to be ICE cold) its just kind of cool. why would it only be blowing out of the defrost vents?

fleetmgr

You've got a vacuum problem somewhere in the lines between the intake manifold and the heater box. All the doors in the heater box are vacuum controlled.

brandon9598

iTrader: (1)

so what exactly/where am i looking for?

snkeater

I believe its a "T" by the computer in the engine bay.

fleetmgr

See this thread:
https://ls1tech.com/forums/general-m...p-someone.html