Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

Highway running high Rev/low rev

Old Jun 23, 2015 | 07:52 PM
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Jct
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Default Highway running high Rev/low rev

Hi, I have an issue with my 6.5 when driving on highway the engine has a noticeable (by ear ) high rev/low Rev it's performance is fine just hear it every time ( my 13 yr old asked me what it was I had no answer...) you can feel it in the peddle sometimes. ......any help would be appreciated. ..I changed injector pump /pmd/boost sensor
 
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