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Old 11-19-2013, 11:59 AM   #1
shultzee13
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Join Date: Jan 2012
Location: Tyler Texas
Posts: 223
Loud Vacuum Sound - 99 Chevy Sub C1500

There is a loud vacuum sound when turning off the motor like a valve closing. The loud vacuum sound is also audible when going down the road.

Strange. I cant seem to find it anywhere. Everything is connected like normal.

Gotta be something simple I am missing.
Thanks.
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