Chevrolet is playing both the Left and the Right. They are hoping that both sides see a part of their ad campaign that they like and will feel 'patriotic' and relate Chevy with the USA.
The truth is that GM has moved almost all their manufacturing to either Mexico or Canada. There are very few GM cars/trucks still built here in the USA.
GM is assuming the population in the USA is too stupid to really look for the truth, and are mindless CNN types that just believe what they see on TV.
Wrong.