Last year, General Motors (GM 0.46%) saw its U.S. market share fall to lows not seen since before World War II -- the result of a tired product line and lingering resentment from the company's 2009 bankruptcy and bailout.

But this year, things are picking up. A slew of new cars and trucks is helping -- but so is another factor, related to the timing of GM's leases. In this video, Fool contributor John Rosevear looks at why GM's past leases are bringing a slew of new customers to dealers now -- and at how that plays in to GM's U.S. growth plans.