---specifically the line providing assist for heater/defrost/vent position
control. Shop did trans replacement for my employer and when my van
returned it had a vac. line laying across air filter box with no airflow
thru heat system. I can't wait 3 wks for them to fix it, and am willing to
diy it, but don't know where the line connects to provide the vaccuum. As a
temp fix, I took a "mityvac" brake bleeder to give vac to open the vent, but
want a more appropriate method.