The massive automaker is trading for a remarkably cheap valuation, despite strong profits and lots of potential.Massive automaker General Motors (GM -1.85%) trades for a rock-bottom valuation of less than 5 times forward earnings estimates. Meanwhile, the company is extremely profitable, management is buying back stock hand over fist, and there's a ton of growth potential as the electric vehicle (EV) and autonomous vehicle strategy evolves. In this video, I sit down with Fool.com automotive expert John Rose ...