General Motors (NYSE:GM) has been solidly profitable for a while, but its profits are still far behind those of its two main global rivals, Toyota (NYSE:TM) and Volkswagen (NASDAQOTH:VLKAY). CEO Dan Akerson has made no secret of the fact that closing that gap is a huge priority for GM.

Surprisingly, the key to Akerson's profit push turns out to be Cadillac, GM's old luxury brand. In this video, contributor John Rosevear looks at the state of the effort to turn Cadillac into a global luxury-car powerhouse -- and at why it's so important to GM right now.

Fool contributor John Rosevear owns shares of General Motors. Follow him on Twitter at @jrosevear. The Motley Fool recommends BMW and General Motors. 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.