Check out which companies are making headlines before the bell:
Alcoa - The aluminum producer began the quarterly earnings season by reporting profits that beat expectations.
Intuitive Surgical - The manufacturer of surgical robots lowered quarterly revenue guidance to well below analysts' estimates.
General Motors - The National Highway Traffic Safety Administration said the auto manufacturer was being fined $7,000 daily for not providing information on its recall of 2.6 million cars for faulty ignition switches by an April 3 deadline. Morgan Stanley downgraded its shares to underweight.