The Chevrolet Spark is the smallest model in GM's U.S. lineup, but it has turned out to be a big hit. 

General Motors (NYSE:GM) may not have known what to expect when it rolled out its tiny Chevy Spark to U.S. customers last year, but it has to be happy with the results. The Spark has proved to be a hit, exceeding sales expectations and drawing plenty of younger buyers into Chevy showrooms.

How did GM manage that, when its prior small cars were mostly cheap-feeling and slow-selling? In this video, contributor John Rosevear looks at the strategy behind GM's little hit – and at why the General has suddenly become a strong player in the area it long neglected, small cars.

Fool contributor John Rosevear owns shares of Ford and General Motors. Follow him on Twitter at @jrosevear. The Motley Fool recommends Ford and General Motors. The Motley Fool owns shares of Ford. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.