Need help identifying a wire/vacuum line

[ebusa]

Anyone know what this gray wire/vaccum line is for and what it's plugged into?

Thanks!

[bismic]

A valve in your coolant line to the heater core.

[Egmonster]

I think it goes direct to the mode switch for your heater. Like bismic said, under vacuum, it closes and blocks the flow of hot coolant to your heater core.

[ebusa]

Thanks for the replys...the reason I asked is because I noticed mine was not connected!

I just had studs and the works done and I was inspecting everything and saw that they grey line was just hanging and not connected to anything.