It used to be pretty obvious which cars, trucks and SUVs were built in the U.S. (Detroit's Big Three of Ford, GM and Chrysler, although Chrysler has since merged with Fiat) and which weren't (everything else). Then in the 1980's the Japanese started building cars here, which made for some interesting arguments about what constituted an 'American' car. But in today's global economy, it's even harder to answer the question: Is your car made in America?Many consumers looking to buy an American-built vehicle have a difficult time identifying one that's assembled here with 100-percent American-built components. That's because it's impossible,...