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Old 02-07-2021, 09:47 AM   #8
sweetk30
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Join Date: May 2012
Location: horseheads,ny rust belt
Posts: 2,794
Re: Need ideas. 15yr old vibration that just won't go away

Gm 96-up 4.3 / 5.0 / 5.7 can get a wierd rpm window skip that fells wierd . What brand spark plugs do you run ? When i was turning wrenches back in the day i noticed bosch plugs did this the most . Run factory acdelco and problem gone .

This might be a thing to look in to . Good luck .
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