GM targeted the plant because of flagging demand for the subcompact Cruz sedan.
The company hasn’t said how many employees were laid off.
Last November, the plane-and-train-maker announced about 5,000 layoffs.
The profits are being announced as GM lays off thousands of workers.
US company plans to close its plant in Quebec City and distribution centre in the Montreal area next September.
Closures to take place by year-end will affect about 65 workers in Barrie and Peterborough.
About 215 people to go, adding to the 340 job cuts from the factory in July.
Closings are part of a cost-cutting plan as the company tries to wrangle falling sales.
Cuts would target salaried employees, reduce global headcount by 10%.
Most of the layoffs will come from hourly employees outside of the US.
Province facing a big drop in revenue from oil and gas, potash and uranium.
Automaker says moves are meant to align production to demand for the cars.
Manufacturer of steel plate, coil and pipe blames pipeline approval delays
Pink slips issued to 400 at company’s Calgary office, more to come at other locations.
Automaker wants to cut administrative expenses and save an additional $200 million annually.