Engine malfunction - '13 Impala

danno195959

2013 impala 3.6l 58000km..engine all of a sudden run VERY rough, flashing mil light, service stabitrak, service traction control...no power, LOTS of smoke out of exhaust..had to tow to dealer its there now..any ideas??this car has been VERY poor quality since buying it in April 2014..been to dealer 4 times all sensor garbage and stuff..gm has VERY poor quality..im going to have to dump this turd and get a japanese car im afraid..i cant trust this gm any more