This weekend, GM’s union leadership will be congregating in Detroit to evaluate a proposed contract. Union leaders will either accept the contract and bring it to their members for a vote, or encourage their members to go on strike. General Motors has been performing well financially over the past four years. As a result, the union has high expectations for this new contract. The current contract will be expiring this weekend- if management is unable to reach an agreement with union leaders, it is possible that a strike will occur.
See "GM Strike Risk at 12-Year High Approaching Weekend Deadline", David Welch, Bloomberg, September 11, 2019