This topic contains 2 replies, has 2 voices, and was last updated by 
bill cruz 2 years ago.
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Topic
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2009 Silverado 5.3L Flex fuel.Where is the vacuum port?
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If your looking to test vacuum you can use the brake booster port on the intake to hook a vacuum gauge to.
Thanks I just wanted another opinion because I just got the truck and to be honest I was a little overwhelmed by all the new stuff in the eng area.Had been driving a 1989 Astro.
Bill
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