Why does my 1500 silverado get a wierd vibration in the pedal at 100 mph?

Kyle

New member
its a 2010 6 speed auto 6.2L v8 gasoline engine. im runnin a kn cold air intake gibson heads and flowmaster 40 series exhuast. oh and a diablo sport trinity tuner. its feels great until i get around 100 mph and was wonderig if its something in the engine or the drivetrain. fyi i know a lil about engines and have never done anything with drivelines or rearend diffs...
...its when i go to the drag strip i know guys gettin way faster in the older body styles
around 29 depending on trim
 
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