Good morning and thank you in advance for any help/ input. The problem I'm experiencing with my Cruze is that after running the car, it starts very rough only during the start up then runs fine. Almost feels like a thud and some clanking. Has never done it when starting first thing in the morning only after running first. Will also start rough up to a few hours after shutting off. Had several dozen cars in my time and never had an issue like this. My concern is that something will break because it certainly feels that's way. Replicated at dealer a bunch of times and they are clueless... anyone have any ideas?