General Motors isn’t ruling out trying to operate the 18 parts and disrtibution centers that the United Auto Workers union expanded its strikes to on Friday.

Asked if the company planned to try to operate the facilities using nonunion employees, such as salaried staff, or perhaps even replacement workers, GM reponded, “We have contingency plans for various scenarios and are prepared to do what is best for our business and customers. We are evaluating if and when to enact those plans.”

The union did not have an immediate comment on GM’s statement.

Ford has been on record as saying that if its 23 parts and distribution centers were struck, it intended to operate them using nonunion staff. It referred to that as a “responsible contingency plan” in order to “keep Ford vehicles on the road – especially to keep first responders and other essential services running.” But the union did not strike Ford’s centers Friday, citing progress in negotiations with that automaker.

The future of the Stellantis parts and distribution centers had become a point of contention during negotiations since the start of the strike. The union had complained that Stellantis was planning to close those operations. The company said it was only planning up upgrade and in some cases move the locations to make them more efficient, and that it had given the union assurances that no jobs would be lost as part of the changes it planned for the center.

“In a lot of cases, it didn’t make sense to make those investments in the location that they’re in,” said Mark Stewart, chief operating officer of Stellantis, in a briefing with reporters the day after the strike started.

But the union said that’s not enough to protect the total number of jobs, that it needs to protect the jobs of members at the centers’ current locations.