General Motors and the union representing Canadian auto workers have reached a tentative contract agreement that could end the strike that began Tuesday morning.

GM said in a statement that work would resume at the company’s facilities Tuesday afternoon.

Lana Payne, president of the Unifor union, said that faced with the workers’ strike, GM had no choice but to follow the model agreement reached with Ford.

The company said it reached a deal around 1 p.m. Tuesday, after workers went on strike after midnight.

The new agreement covers approximately 4,300 workers at GM’s assembly plant in Oshawa, Ont., powertrain plant in St. Catharines, Ont., and parts distribution center in Woodstock, Ont. .

Payne said GM agreed to all the issues it fought the union on, such as pensions, retiree income and converting temporary workers to permanent employees, during the deal.

Unifor represents more than 4,200 factory workers.

GM workers went on strike after Unifor workers ratified a new three-year contract with Ford late last month.

Payne has previously said the union has great bargaining power with GM because the Oshawa, Ont., plant works around the clock to make profitable Chevrolet trucks. However, in his remarks to reporters, he said “demographics”, likely an aging workforce, was a major obstacle.

Late last month, Ford Canada workers ratified a new agreement that increases the base hourly wage of production workers by nearly 20% over three years.

Unifor is the largest private sector union in Canada, with 315,000 workers across many sectors.