ROANOKE, IN—GM has added more than 400 hourly and salaried workers at its assembly plant here to help with production of the company’s revamped full-size trucks.

DETROIT—GM and Honda are collaborating to develop fuel cells and hydrogen storage technologies.

MEXICO CITY—GM will invest $691 million to expand its Mexican operations, including engine assembly plant in Toluca.

DETROIT—The federal government plans to sell another 30 million shares of General Motors stock in a public offering today as it speeds up efforts to divest itself from a stake in the auto giant that it got in a bailout four years ago.

LANSING, MI—GM plans to spend $44.5 million to open a new logistics center at its Lansing Grand River assembly plant, creating 200 jobs.

DETROIT—GM is planning to invest approximately $16 billion in its U.S. factories by 2016. The automaker is planning to unveil about 20 new or revamped vehicles in the United States.

RÜSSELSHEIM, Germany—GM will invest $301 million to construction new testing facilities at its European Product Development Center here.

DETROIT—GM and Ford will jointly develop a new line of nine- and 10-speed automatic transmissions for cars and trucks to enhance vehicle performance and fuel economy.

ROMULUS, MI—A man threatening suicide with a starter pistol caused the brief evacuation of GM’s powertrain assembly plant here Friday morning, but the incident ended safely with no injuries after police talked the man into surrendering.