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Showing results for tags 'fluttering'.
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I have a 2018 GMC Denali 6.2 that is a month and a half old, 2300 miles, 8 speed transmission. Since new it pulsates or flutters under take off, not a miss but like something is holding it back. It seems to me a fuel management or torque converter programming issue? It just does not have a smooth pull as other vehicles I have owned do. It is smooth at level speed and has no transmission lags or jerks under acceleration or deceleration. The dealer has no answers since it does not throw a code but understands and puzzled as it is obviously there. Runs the same on 91 and/or 87 octane, literally no difference. Love the truck other than the acceleration issue, Any Suggestions Please? All update bullitons were recently verified and were been done prior to purchase/delivery.