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 (OTC:VWAGY). 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, Fool.com 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.