General Motors, planning to invest $1.5 billion in its North American factories this year, today said it would spend $600 million to expand a Kansas vehicle-assembly plant.

The project includes construction of a new paint shop and installation of a new stamping press, GM said in a statement on its website. The Detroit-based automaker is introducing about 20 new vehicles in the U.S. this year, including 13 Chevrolet models, to freshen its product lineup, which has grown stale following the company’s 2009 bankruptcy reorganization.