Gary Jones, who has been a UAW member for 44 years, stepped down to let the union focus on its core mission of improving the lives of members and their families.
Sides have been meeting daily since the GM strike began on September 16 with its 48,000 UAW members seeking higher pay, greater job security, a bigger share of the automaker's profit and protection of healthcare benefits.
The strike will affect GM plants in Michigan, Ohio, Tennessee, Kentucky, New York, Texas and elsewhere in the US.
The union said it will let its four-year contract with General Motors expire just before midnight. But workers are to report to their jobs if they're scheduled to work on Sunday.
US President Donald Trump removes import taxes on Canadian and Mexican steel and aluminum but delays auto tariffs that would have hurt Japan and Europe.
Mercedes, Germany's trademark car company, wants to develop a self-driving car, increasing fierce competition with firms like Uber, Google, General Motors and Volkswagen.
The US auto giant will lay off up to 14,000 factory and white-collar workers in North America and put five plants up for possible closure as it restructures to cut costs and focus more on autonomous and electric vehicles.
Opel, acquired from General Motors barely a year ago when it was a billion dollars a year under GM ownership, has delivered its first profit since 1999 as PSA implemented cost-cutting measures.
Under the revised trade pact agreed upon by both countries, US automakers win improved market access and South Korean steelmakers have been hit with quotas while avoiding hefty tariffs.
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