I have a 2006 Cobalt LT with 87000 km on it. I have noticed recently while driving at highway speeds (around 110km/h) with the cruise engaged I will suddenly feel a bucking sensation. It feels like a torque converter issue or sudden engine miss. I haven't noticed the tach jump at all but like I said it does it out of the blew and intermittently and hasonly done ita few times. I haven't had it at my dealer yet because I wanted to see if anyone else has had a similar situation. Has anyone else had a similar issue?