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  1. shake & booming sound in 1300-1400 rpm

    Gen 9 Problems/Service Issues/Troubleshooting
    hi there I have 2018 Malibu ls 18k on it , the problem is when I hovering rpm at 1300-1500 on any gear p n d the car shake with booming sound in the cabin ,the engine mount in perfect condition & exhaust too ,the car has no check engine light, and the car work fine one any rpm except the 1300 to...