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post #1 of 5 (permalink) Old 12-31-18, 09:11 AM Thread Starter
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Vacuum booster hose

Hi All

Can someone tell me what is that small hose (please check the picture) coming from the vacuum hose grommet for?
hose.jpg

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post #2 of 5 (permalink) Old 01-05-19, 04:12 AM
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Re: Vacuum booster hose

Tough to tell, what year is this?

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #3 of 5 (permalink) Old 01-06-19, 11:31 AM Thread Starter
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Re: Vacuum booster hose

2008 navigator 4x4
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post #4 of 5 (permalink) Old 01-07-19, 04:03 PM
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Re: Vacuum booster hose

I saw an earlier schematic that has it going to the heater controls. Not sure if you're applicable.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #5 of 5 (permalink) Old 01-13-19, 08:35 AM Thread Starter
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Re: Vacuum booster hose

I managed to reconnect that small hose to the booster grommet. MPG and power are back to normal.
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