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smoking on start up


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2017 GMC Denali  6.2 , after my truck sits for a few days and i start up i notice a small puff of blue smoke coming from tail pipe.

My experience from other vehicles is that is usually an indication of oil seeping past valve seats. I have noticed that on other vehicles before ,but usually high mileage vehicles my truck only has 14K miles. 

Has anyone else noticed this or have and suggestions if that is normal for new engines or should I be concerned ?

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