Discussions between Unifor and GM are scheduled to begin on Thursday, and the union set a strike deadline of 11:59 p.m. ET on Nov. 5. The talks will cover about 1,600 hourly workers, most of them at the St. Catharines plant.

According to the union, 78 per cent of FCA voting members cast a vote in favour of the agreement during virtual ratification voting that ran from Sunday through Monday morning.

Unifor leaders on Sunday urged Fiat Chrysler Automobiles workers to ratify a tentative contract that includes pay raises, changes to the new-hire pay grid and plans from the automaker to invest between $1.3 and $1.5 billion in its Windsor, Ont., assembly plant.

At FCA's Windsor minivan plant, questions from members might focus on how firm FCA is in its commitment to spend up to $1.5 billion on retooling for an electric — or plug-in hybrid — vehicle. In Brampton, some workers might be more concerned about its lack of major investments.