Not trying to be an a$$, but do you really call this a "quirk" ? Because this can be caused even by the irregularity of the road or the quality of the gasoline.
White Platinum Metallic Tri-Coat
303A, 6-Speed SelectShift Automatic, 17" Aluminum wheels, Luxury Package,
Parking Technology, Navigation, Winter Package
Chevy Volt 2014, White Diamond, Luxury Package, S1, Navigation.