"Now that a tentative agreement has been reached work will resume at all GM facilities," Unifor wrote in a statement.

Here's Unifor's statement that includes highlights of the agreement:

Members at General Motors,

Unifor and General Motors have reached a tentative agreement following strike action at Oshawa Assembly Plant, St. Catharines Powertrain Plant and Woodstock Parts Distribution Centre.

It is thanks to the solidarity of you, the members, that it was possible to move General Motors to accept the pattern to the letter, including all items that company had initial fought us on such as pensions, retiree income supports and converting full-time temporary workers into permanent employees over the life of the agreement.

Now that a tentative agreement has been reached work will resume at all GM facilities. Unifor members must report for their regularly scheduled work shift in your plant beginning at 2:30 p.m. today.

Details on the ratification process will be sent via email with meetings to be scheduled in the coming days. A master bargaining brochure and a local bargaining brochure with details specific to all General Motors facilities will be made available in advance of those meetings.