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where does vacuum hose for heater vent control connect to engine on 1990 Chevrolet Celebrity

everthing comes out defrost vents including ac

Asked by for the 1990 Chevrolet Celebrity
Can you still see the vacuum hose diagram on the underside of hood?
thanks for the quick response to my question. i don't see any vac hose diagram under hood.
Look around, it was one there once upon a time! Do you see any labels at all? Look again! Looks like a bunch of black lines on a white label, or vice versa.
Which engine? 4 or 6 cyl.? And do you see the hose at all? You ask where it connects to the eng. so do you see the hose? Repair shop is where you need yo go.