GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

port on back of manifold?

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Old Nov 7, 2015 | 01:29 AM
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Default port on back of manifold?

Sorry for the newbish question. I tried searching but didn't know what to call the thing.

What is the port used for on the back of the truck manifolds?

(Not my pic)

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Old Nov 7, 2015 | 01:34 AM
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Brake booster vacuum hose fitting
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Old Nov 7, 2015 | 02:03 AM
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Ok thanks. That makes a lot of sense. I can pop it out and put a nipple in.
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Old Nov 7, 2015 | 10:04 AM
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Yeah its something like $4 at the dealer or you can find one in a junkyard.... Or if you have vacuum brakes, pull it out of your intake
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