97 astro AC vent

The vac tube that controls my AC vents has come loose and I can't
find where it goes back to. I can hear hissing sound of a vacuum leak
but cannot pin point the location.
I have the engine cover off , so I have acces to the back and top
of the engine.
Any ideas??

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1 22nd August 20:57 sammy External User Posts: 1	97 astro AC vent The vac tube that controls my AC vents has come loose and I can't find where it goes back to. I can hear hissing sound of a vacuum leak but cannot pin point the location. I have the engine cover off , so I have acces to the back and top of the engine. Any ideas??