Hissing sound - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 1 (permalink) Old 04-03-2012, 09:23 PM Thread Starter
Join Date: Jan 2012
Posts: 584
Hissing sound

Okay so while I was driving my car yesterday I heard a hissing sound like super loud.

It only happens when the rpms are 2500 or higher.

What do you guys think it could be?
A vacuum line or something else.

Ps haven't had time to look and see if I could find it yet.
I only ask because I would like opinions.

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