General Motors (NYSE:GM) has been building and selling cars in Brazil for decades, but the car market in this big nation has recently taken off: Some estimates suggest that as many as 40 million Brazilians have joined the middle class over the past decade.

In this video, Fool contributor John Rosevear looks at the state of GM's position in this fast-growing market, and at the competition it faces for a huge crowd of new car buyers.