Ford said in a statement it is yet to determine when it will resume production at its North American plants, while Fiat Chrysler said it will communicate new restart dates in due course
The company has previously said GM's suit is baseless and aimed at disrupting the Italian-American automaker's proposed merger with France's Peugeot SA
The boards of PSA and Fiat Chrysler (FCA) backed the plan on Wednesday that would result in a company with combined sales of nearly 170 billion euros ($190 billion) per year
Fiat Chrysler (FCA) had stunned the markets last week by proposing a "merger of equals" with the French group that would create an auto giant spanning the globe