TRENTON, MI—Chrysler has begun work on a new engine assembly line at its assembly plant here—a move that could add more than 200 new 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.

GRAND BLANC TOWNSHIP, MI—Magna E-Car Systems’ creation of a new assembly plant here helped Michigan add 14,600 manufacturing jobs in 2012, according to Manufacturers’ News Inc.

LANSING, MI—The Lansing City Council on Monday approved a $4 million tax break for GM to build a $38.6 million logistical center near the automaker’s Lansing Grand River Assembly Plant.

DELHI TOWNSHIP, MI—MPT Lansing LLC, an automotive assembly division of Magna International Inc., plans to expand its operation here with a $7.3 million assembly line that would create 39 jobs.

STERLING HEIGHTS, MI—Jervis B. Webb Co. is working on a $60 million conveyor project at Chrysler’s assembly plant here.

HOLLAND, MI—LG Chem aims to start production at its automotive lithium-ion battery factory here in the second half of this year.

FLAT ROCK, MI—As production plans gear up, the hiring process has begun for a second shift at Ford’s assembly plant here. The automaker expects to hire 1,400 workers.

MOUNT MORRIS TOWNSHIP, MI—Sanluis Rassini, which makes leaf springs, brake components and other auto parts, is building a $17.3 million assembly plant here. The facility is expected to create 55 jobs.

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.