Re: HELP! What is this?
That vacuum line is for the valve on your heater hose line to the heater core. When you put your selector on Max AC, it puts vacuum to the valve and shuts off the hot coolant going to the core so after a few minutes it will cool down and your AC cold air will not have to cool any components. Just makes the AC air colder
230 hp 4.3L Chevy
Built 4L60E with manual lockout
Atlas 4 speed
Griffin radiator
On board air
Warn 9.5ti on custom bumper
7.5" RE front and bastard pack rear on custom long arms
30 gal gas tank
lockers
And a bunch of other stuff
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