What is this vacuum for?

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Dan2002

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I have a 2002 gmc yukon denali.

I bought and it had a cracked intake manifold. Well actually it was a small hole. Like someone tried to install audio system on it and accidentally made a hole on the intake.

It was plugged with a ear plug. I removed it and applied apoxy for a temporary fix. Well it turned out to be 2 years before I could get to it.
I bought a used intake online. In excellent condition.

Bought new gaskets and installed it about 3 weeks ago. Worked great.

My water pump went out and when I was checking where my water pump was leaking from I had the engine running and I could hear a vacuum leak and it was leaking from the upper intake. Like if a hose goes in there or something.

I tried to look for any loose hose but couldn't find any. Maybe the intake was for a different model?

iMarkup_20201128_162131.jpg
 

BG1988

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you can always take it off and look up the part number be careful though brittle plastic

compare it to the old intake? other wise you will need to get a cap for it
 

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