Aug 27, 2026
Unifor has reached a tentative collective agreement with General Motors covering more than 4,600 auto workers across Ontario, striking a deal in the midst of heightened trade tensions and tariff uncertainty with the United States.
The union announced the preliminary deal following intensive negotiations that began earlier this month. The agreement comes at a precarious time for Canada’s auto sector, as cross-border supply chains face pressure from ongoing trade friction and proposed tariffs.
Agreement delivers gains despite trade friction
Unifor National President Lana Payne praised the bargaining committee’s efforts, noting the agreement delivers significant gains despite broader economic instability.
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“Our bargaining committee worked diligently to reach these agreements, which deliver strong income and benefit gains, amid some of the most challenging times in our history,” Payne said in a statement.
Trevor Longpre, Unifor’s GM master bargaining chairperson, highlighted the economic backdrop that shaped the high-stakes talks.
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“We entered this round of talks in the midst of tariff uncertainty and relentless US trade aggression,” Longpre said in a statement, adding that the negotiating team succeeded in securing the pattern set earlier this year in union talks with Ford Motor Co.
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Negotiations unfold amid rising cross-border trade friction
The talks between GM and Unifor played out against a volatile trade backdrop marked by recent threats of new duties on Canadian-made vehicles, auto components and raw materials.
Cross-border auto supply chains have faced intense scrutiny as bilateral trade discussions stall over tariff exemptions for vehicles assembled in Canada. The prospect of tariffs threatens to increase production costs for automakers operating integrated networks across Ontario and the US Midwest.
Despite these macro-economic pressures, securing a labour agreement stabilizes operations at key facilities, shielding GM from potential labour disruptions as the industry navigates broader regulatory and trade uncertainty.
Deal impacts key Ontario manufacturing plants
The tentative deal covers unionized employees at GM operations across Ontario, including the Oshawa Assembly Plant, the St. Catharines Propulsion Plant, the Woodstock Parts Distribution Centre and the idled CAMI Assembly Plant in Ingersoll.
A central priority for the union leading into bargaining was the future of the CAMI facility, where roughly 1,000 workers have faced uncertainty following production pauses.
Union members to vote on ratification this week
The Unifor General Motors Master Bargaining Committee has unanimously endorsed the tentative agreements.
Union members are scheduled to review full details of the proposed contracts during ratification meetings set for August 29 and August 30. If approved by membership, Unifor will shift its focus to negotiations with Stellantis to complete pattern bargaining across the Detroit Three automakers.
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Leslie Kennedy served as an editor at Thomson Reuters and for Star Media Group, followed by a number of years as a writer and editor and content manager in marketing communications, before returning to her editorial roots. She is a graduate of Humber College’s post-graduate journalism program and has been a professional writer and editor ever since.
