General Motors Co. plans to invest $200 million to expand operations at its Global Powertrain Engineering headquarters in Pontiac, Mich., and consolidate functions there from four other operations. The automaker said the capital investments are part of the plans it announced previously to invest $1.5 billion in North American operations. At Pontiac, GM will build a 138,000-sq.-ft. testing center that would be available in the second half of 2014.

“These moves will help our entire Powertrain team work more effectively across the organization to develop the powertrain technologies we need to build the world’s best vehicles for our customers around the world,” stated Sam Winegarden, GM vice president of Global Engine Engineering.

In 2008, GM consolidated seven Powertrain Engineering operations at Pontiac from various Michigan locations, and it said the coming combination would reduce its total footprint by 640,000 sq. ft. and eliminate three leased facilities.

The leased operations are in Wixom, Mich., Castleton, Ind. and Torrance, Calif. A fourth powertrain operation, GM R&D’s Propulsion Systems Research lab in Warren, Mich. will relocate to the Pontiac campus.

Previously announced that its hydrogen fuel cell operation would move from in Honeoye Falls, N.Y., to Pontiac. That shift will happen this year.

With the addition of the testing center, GM’s Powertrain Development Center in Pontiac will be a 450,000 sq.-ft. facility that the automaker predicts will bring engine technologies to market faster and less expensively, because it will reduce development time. Engineers will test engines for durability, reliability and quality under extreme conditions, including cold ambient temperatures, high RPMs, and repetitive starting and stopping.