Of the total amount to be invested, $300m will come from GM itself and $200m from the company’s supplier network.
The company previously spent $740m between 2014 and 2016 in the 20-year-old plant.
The new funds will be invested over the next three years, with first production expected in 2020.
Carlos Zarlenga, president of General Motors Mercosur, said: “GM renews its commitment with Argentina, and it will be reinvesting strongly in the country with the aim of producing a new, high value-added global model which will help strengthen Argentina’s basis of exports in line with the 1 million plan launched by the National Government, tending to increasing domestic production and the positioning of Argentina as a global export platform.”
The investment plan also includes an increase of GM operations at the Terminal Puerto de Rosario (TPR), where about 6,000 containers and 1,500 vehicles a year are currently moved.
Once completed, the annual container volume will double and the import and export of vehicles at the terminal will total over 100,000 units a year.
Back in August, the company, which combined its Argentina and Brazil operations under the GM Mercosur name earlier this year, announced a $1.4 billion investment in its São Caetano do Sul, Joinville and Gravataí facilities in Brazil.
Last year, 445,616 Chevrolet vehicles were sold in the two countries, of which 345,916 were in Brazil and 99,700 in Argentina.