Mexican GM Workers to Vote Next Week on Union at Second Plant

Members of SINTTIA (the National Auto Workers Union) gathered for a May Day demonstration in Mexico City. A win for SINTTIA at GM's San Luis Potosí plant would mark a major breakthrough for Mexico’s labor movement. Photo: SINTTIA

June 18, 2025 / Natascha Elena Uhlmann

Workers at a second General Motors assembly plant in Mexico will vote June 25 to 27 on whether to join SINTTIA (the National Auto Workers Union), the independent union that won a landmark election to represent workers at the company’s Silao plant in 2022.

A win for SINTTIA at the plant, located 90 miles north of Silao in San Luis Potosí, would mark a major breakthrough for Mexico’s labor movement. It would be the first time that an independent union represents two assembly plants at one of the Big Three automakers.

The 6,500 workers set to vote produce the GMC Terrain and the Chevrolet Trax and Equinox SUVs.
PROTECTION UNIONS

GM workers in San Luis Potosí voted out their previous union, a Confederation of Mexican Workers (CTM) affiliate, in 2023. The CTM has built a reputation for imposing pro-boss “protection contracts” that lock in low wages and prevent true union representation.

FULL story: https://labornotes.org/mexican-gm-workers-to-vote-union-election