General Motors (NYSE:GM) is still one of the world's biggest automakers -- but lately, its profits have been far behind those of rivals. GM outsold every automaker but Toyota (NYSE:TM) last year -- but Volkswagen (NASDAQOTH:VLKAY) and Ford (NYSE:F), among others, earned more money.

What's the problem with GM? In this video, contributor John Rosevear explains why GM's profits have lagged. He also points out what GM needs to change in order to close the gap -- and looks at whether those changes are likely to happen.

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.