I bought a Sonic LTZ 2012 and it leaves a lot to be desired. It has already presented failures in the battery and thermostat. Even more, a terrible noise appeared coming from the suspension, as well as another one on the right side which is just as if something were boiling. I have also encountered problems with the gearbox. It is really frustrating.
There's a small square cap you can pop off beside the shifter. Then stick something in there to depress a button that will unlock the shifter. It's there so you can shift our of park in emergencies or maintenance