General Motors (NYSE:GM) has been working to revive its old luxury brand Cadillac for over a decade now. Lately, there are some promising signs of success: Sales are up big so far this year, in both the U.S. and overseas.

In this video, Fool contributor John Rosevear checks in on GM's ongoing effort to turn Cadillac around and explains why the ancient brand's success has become so important to GM's biggest goals now.

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