Some new cars just have that problem, my mom had a 2001 Grand Am GT brand spankin new and the passenger side floor used to get wet. They never did figure out the problem they tried all sort of crap to fix it at the dealership. Its not just chevys trust me, there is always a car coming off the line of any given manufacturer that has leaks or small imperfections in its design. That is one reason there has been a big hold up with making Cobalts and getting them to the dealerships, GM is having trouble stamping the metal. Codes and such have to be added to the car by way of stamping it, but there is some odd reason why it is difficult to stamp the Cobalts. An with the Pontiac Solstice they are having fitment issues with the front 1/4 panels and nose so that is the big hold up with that. It may just be an easy fix, I hope it works out for you.