hmmm from what i read, which isnt much, its the same idea as noise canceling for stereo components, supposed to smooth idle. im going to try it on my tahoe as it has a really rough idle and no one seems to be able to pinpoint the problem. 3 dealerships and nothing has been said other than these engines just run rough. BS its a 2007 and the revs bounce all over at idle.
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04 LowHemi
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