(Reuters) — U.S. automakers are ramping up promotions ahead of Black Friday to clear out bulging inventories and dispel investor doubts about consumer demand. U.S. automakers are ramping up promotions ahead of Black Friday to clear out bulging inventories and reassure investors that business is solid. The biggest promotions are on sedans, compact cars, and sports cars as consumers shift to pickup trucks and SUVs. Shares of General Motors, Ford Motor, and Fiat Chrysler are […]