As i was working on the truck yesterday I pulled a vacuum line loose. I am pretty certain that it is supposed to attach to the valve on the heater hose. The valve on the heater hose has two barbs though so I do not know if i am missing another hose or what? Could someone help me out with a picture or explanation of where this hose attached?

 

Yeah that goes to the heater valve but there should only be one barb on that valve. It goes to the center of the vacuum actuator (if you are looking at the valve like in the picture, it is at the back of all that.

 

Thanks for the help. The second barb I found by feel so it may not be an actual barb.

 

Wirelessly posted

It's a nipple

 

That could explain why there are two of them.