General Motors and Unifor have reached a tentative contract settlement covering more than 4,600 workers across four Ontario operations, ending a closely watched round of bargaining before it could turn into a labour disruption. The agreement spans GM facilities in Oshawa, Ingersoll, St. Catharines and Woodstock, tying together workforces facing markedly different circumstances — from fresh investment and new production plans to layoffs and an uncertain manufacturing future.
Unifor says the proposed contracts deliver gains in income and benefits while securing the bargaining pattern established earlier with Ford. The union’s bargaining committee is unanimously recommending the settlement, but the deal is not yet final. Workers will receive the full terms and vote during ratification meetings scheduled for August 29 and 30, putting thousands of Ontario auto families at the centre of the next decision.
The Deal Is Tentative Until Workers Vote
The agreement covers members of Unifor Locals 222, 88, 199 and 636 working at Oshawa Assembly, CAMI Assembly in Ingersoll, St. Catharines Propulsion and GM’s Woodstock Parts Distribution Centre. Unifor announced the settlement on August 22 after bargaining that began earlier in the month. Union representatives said the package contains meaningful income and benefit improvements and that the bargaining committee unanimously recommends ratification.
That distinction matters because a tentative settlement is not the same as a completed collective agreement. The detailed wage schedules, benefit changes, job-security provisions and other plant-specific language have not yet been publicly released. Unifor plans to explain those provisions directly to members at ratification meetings on August 29 and 30 before votes are held. Until then, claims that individual GM provisions exactly mirror every element of Ford’s contract would go beyond what has been disclosed publicly.
Ford’s Contract Established the Pattern GM Workers Were Seeking
Unifor entered the GM negotiations with a benchmark already established. About 5,150 Ford workers ratified a new three-year agreement in July, giving the union a pattern it intended to carry into bargaining with General Motors and, later, Stellantis. The Ford settlement provides general wage increases of three per cent in each year, alongside improvements involving pensions, benefits, income security and plant investment commitments.
Pattern bargaining has long been important in the Detroit Three because workers assembling competing vehicles often compare compensation across companies. Unifor says the GM settlement successfully secures the Ford pattern, but the GM-specific details remain under wraps until ratification. That leaves an important distinction: the Ford agreement gives workers a useful indication of the economic framework, while the GM package will contain language shaped by GM’s own plants, products and employment challenges. Those differences could be especially significant at facilities dealing with layoffs or uncertain future production.
Four Ontario Workforces Came to the Table From Different Positions
The bargaining unit is substantial but far from uniform. When negotiations opened, Unifor represented approximately 2,750 workers at Oshawa Assembly, about 1,050 at CAMI Assembly, roughly 700 at St. Catharines Propulsion and approximately 110 at the Woodstock distribution operation. The union said around 30 per cent of its GM membership in Canada was on layoff at the beginning of bargaining.
Those numbers help explain why the negotiations were about more than hourly pay. An Oshawa worker looking toward the next generation of full-size pickups faces a very different employment outlook from a CAMI worker whose assembly plant has been idled. St. Catharines, meanwhile, recently received a major engine investment, while Woodstock plays a smaller but important parts-distribution role. One master bargaining round therefore had to address thousands of households experiencing the auto industry’s upheaval in very different ways, making employment security particularly important alongside traditional wage and benefit issues.
Oshawa Combines Major Production With Recent Layoff Pain
Oshawa remains one of GM Canada’s most important manufacturing operations. Since truck production resumed in November 2021, the plant has produced more than 500,000 Chevrolet Silverado pickups and more than one million aftermarket parts. GM has also announced a C$343-million investment to prepare Oshawa to build the next generation of gasoline-powered full-size pickups, bringing the company’s investment in the facility since 2020 to roughly C$1.5 billion.
Yet those large numbers coexist with recent workforce disruption. GM moved Oshawa to two shifts in February 2026, resulting in about 500 layoffs. Eligible workers were covered by a combination of employment insurance and contractual Supplemental Unemployment Benefits designed to replace a portion of regular earnings. That contrast — hundreds of millions of dollars in future manufacturing investment alongside hundreds of workers temporarily losing regular shifts — illustrates why members may scrutinize the settlement for more than headline wage gains. Product commitments and income protection can be just as consequential.
CAMI’s Uncertain Future Makes Job Security Especially Personal
The situation at CAMI Assembly in Ingersoll is considerably more difficult. Production was suspended in 2025 as demand for BrightDrop electric commercial vans developed more slowly than GM had expected, and BrightDrop vehicle production at the facility ultimately ended in October. For roughly 1,050 Unifor-represented workers connected to CAMI during bargaining, the central question is not simply what the next pay increase looks like, but what product could bring sustained assembly work back to the plant.
The uncertainty is particularly striking because CAMI had undergone a major transformation into Canada’s first full-scale electric-vehicle assembly facility. BrightDrop vehicles began rolling off the line there in December 2022, and GM later added a roughly 400,000-square-foot battery-module operation that started production in 2024. Those investments demonstrate how quickly industrial strategies can change when demand, regulations and incentives shift. For workers who spent years adapting to EV production, future-product language in any ratified agreement could therefore carry enormous practical significance.
St. Catharines Has Fresh Investment Behind Its Bargaining Position
Workers at GM’s St. Catharines Propulsion Plant entered the bargaining round with a comparatively concrete production commitment. In April, GM announced a C$691-million investment to prepare the operation to manufacture components for its sixth-generation family of V8 engines. The project involves new machinery, tooling and renovations at a plant whose automotive manufacturing history stretches back more than seven decades.
GM says the latest commitment brings its investment in St. Catharines since 2020 to about C$828 million. The Ontario operation is one of three North American facilities selected for production associated with the next-generation V8 program, alongside plants in Michigan and New York. For approximately 700 Unifor members at St. Catharines, that investment provides a clearer production horizon than exists at CAMI. Even so, capital spending alone does not determine workers’ future earnings, staffing levels or contractual protections. Ratification documents will show how the tentative agreement connects that industrial investment with the employment conditions experienced on the plant floor.
U.S. Tariffs Have Raised the Stakes for Ontario Auto Workers
The negotiations are unfolding while Canada’s auto industry remains unusually exposed to decisions made south of the border. More than 90 per cent of Canadian-made vehicles are normally exported to the United States, along with a large share of Canadian auto parts. Federal figures put direct Canadian employment in automotive manufacturing at about 125,000 jobs, while Statistics Canada estimated that roughly three-quarters of payroll jobs in automobile and light-duty vehicle manufacturing depended on U.S. final demand in 2024.
That dependence has become more consequential as U.S. tariffs have disrupted established North American supply chains. Canadian-made vehicles have faced a 25 per cent U.S. tariff on the portion of their value that does not originate in the United States. For an assembly worker in Oshawa or an engine worker in St. Catharines, tariffs are therefore not an abstract trade-policy dispute. They can influence production schedules, investment calculations and ultimately how many shifts a plant needs, complicating negotiations over long-term job security.
GM Has Invested Billions, but the Results Are Uneven Across Plants
GM says it has invested approximately C$3.3 billion in its Canadian operations since 2020, a period that has included the restart of Oshawa pickup production, electric-vehicle investments at CAMI and new propulsion spending in St. Catharines. Those commitments reinforce Canada’s continued role in GM’s North American manufacturing footprint, even as the company restructures products and capacity to respond to changing consumer demand and government policies.
The experience of the four bargaining locations shows why an aggregate investment figure can tell only part of the story. Oshawa has another truck program in its future but has also lost a shift. St. Catharines has a major new engine mandate. CAMI contains modern EV and battery infrastructure but no longer has BrightDrop vehicle production. Woodstock’s much smaller workforce supports the parts-distribution side of the business. A contract covering all four locations must therefore operate across dramatically different industrial realities, which is why workers are likely to examine plant-specific commitments as closely as company-wide compensation provisions.
Ratification Will Reveal the Most Important Details
The next decisive dates are August 29 and 30, when Unifor members are scheduled to receive detailed presentations and vote on the proposed GM agreements. Until those meetings, the union is keeping the full package confidential so members can review it before broader publication. The bargaining committee’s unanimous recommendation gives the settlement institutional support, but ratification rests with the workers covered by the contracts.
The outcome will also shape the next stage of Unifor’s Detroit Three bargaining strategy. The union represents nearly 19,000 workers across Ford, GM and Stellantis in Canada, making the sequence of agreements important beyond any single company. Ford has already ratified its deal, GM now has a tentative settlement, and attention can turn increasingly toward Stellantis. For Ontario communities built around auto plants, however, the immediate issue is closer to home: whether GM workers believe the proposed combination of compensation, benefits and security is strong enough for an industry facing unusually rapid change.
