GM workers in northern Mexico vote to keep union contract

General Motors Co (NYSE:GM) workers in northern Mexico have voted by a broad margin to keep their collective contract with one of Mexico’s biggest unions, weeks after GM workers in central Mexico elected independent representation, ousting the long-dominant group.

In votes Thursday and Friday at General Motors in the city of Ramos Arizpe in the border state of Coahuila, several thousand workers cast ballots to keep ties with the Confederation of Mexican Workers (CTM), the union said on Sunday.

Contract ratification votes are required under Mexico’s 2019 labor reform, which underpins a new trade deal with the United States and Canada, to ensure workers are not bound to contracts that were signed behind their backs, hampering them from demanding better pay.

In the global propulsion systems area of the GM plant, 94% of 1,379 votes cast were in favor of the contract, as were 96% of 2,657 ballots cast in the larger assembly area, CTM said in a statement.

More than 4,500 employees were eligible to vote at the 40-year-old plant, which produces Chevrolet Blazer and Chevrolet Equinox cars as well as two engine types.

General Motors did not immediately reply to a request for comment.