2013 is a critical year for General Motors as the American auto giant tries to overcome the stigma of bankruptcy and retake market share in the U.S. Management has been touting a series of high-profile vehicle launches, but none is more important than the company's new line of full-size pickups. If successful, the new pickups have the potential to boost GM's profitability, but in the meantime GM has to manage a complex transition between the previous architecture and the new one. Analysts and investors have worried that GM may have too much inventory of the old pickup trucks, which could force margin-sapping discounts or crimp sales of the new models. I expect these concerns to weigh on the stock until the transition is more or less complete at the end of the year. New trucks coming GM is launching new versions of the Chevy Silverado and GMC Sierra pickups this spring. On Monday, executives announced that Silverado pricing would remain the same compared to the current generation.