TORONTO — The union representing Canadian auto workers claimed a partial victory Tuesday after General Motors Canada announced an Oshawa, Ont., plant slated to close later this year will be converted to a part-stamping and autonomous vehicle testing facility.

Unifor and GM Canada said the transition will cost $170 million and save 300 of the 2,600 union jobs at the plant, with the potential to attract more jobs as the facility attracts new customers.

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