Suppliers may be a bigger target in the future than automakers such as Volkswagen, Nissan, Toyota and Honda as decades of attempts at organizing those plants have failed.
The GM agreement occurred early Monday morning, just hours after thousands of workers at its Spring Hill, Tennessee, assembly plant joined the strike ranks.
Ford agreed to raise base wages by 25%, restore a 2009-era cost-of-living-adjustment, eliminate wage tiers, and allow the UAW to strike over plant closures.