Detroit - If you're an automaker, especially one from Detroit, conditions probably aren't going to be better for you to make a lot of cash.   For General Motors, that's what happened last year as the company posted a record $9.7 billion net profit. Yes, a good chunk of that was a $3.9 billion one-time accounting gain due to better prospects in Europe, but the company still made billions on booming sales of its strong lineup of SUVs and trucks, mainly in North America.