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Marcello Pace

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  1. Marcello Pace
    Hello my 2021 5.3 AT4 shakes also… I noted it after doing the K&N CAI and exhaust.. then at 8127 my # 6 lifter blew .. after repair it just shakes all the time while going slow! I return it to stock filter and it got 80% better but now with Air conditioning on it is more noticeable. A/c Off near perfect I don’t know but Dealerships say it is operating to Spec but I doubt it. during lifter warranty work they also replaced #1 cylinder plug for misfiring and it was fouled. So I will soon be going to Mobile 1 oil and all new plugs hopefully this helps
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