Oshawa Assembly will keep building pickup trucks, but one of the products that helped revive the historic Ontario factory is about to leave. General Motors has confirmed that production of the light-duty Chevrolet Silverado 1500 will end at the plant in November 2026 as the redesigned 2027 model moves to U.S. and Mexican factories.
The decision removes Oshawa from GM’s next-generation light-duty Silverado manufacturing footprint just five years after truck production restarted there. GM says the change is not expected to reduce employment at the plant, because Silverado HD output will increase and the next-generation GMC Sierra HD is eventually being added. Even so, the shift is significant for Canadian auto manufacturing at a time when tariffs, production allocations and cross-border investment have become inseparable parts of the North American auto story.
November Will End Oshawa’s Current Silverado 1500 Run
GM spokesperson Jennifer Wright has confirmed that Silverado 1500 production at Oshawa Assembly will stop in November. Until now, the Ontario plant has occupied an unusual position in GM’s truck network because it has assembled both light-duty Silverado 1500s and heavier Silverado HD pickups on the same line. GM’s own plant information describes Oshawa as its only facility producing both versions, making the loss of the light-duty truck a meaningful change in what the factory does.
The company is stressing that ending Silverado 1500 assembly does not mean another immediate workforce reduction. Wright said employment levels are expected to remain unchanged as GM shifts the plant toward greater Silverado HD production and prepares for an additional heavy-duty GMC product. That distinction is important after a difficult year for Oshawa workers. The plant already moved from three production shifts to two in February 2026. The November change therefore represents another major product transition, but GM’s current plan is to replace the disappearing light-duty volume with heavier trucks rather than shrink the factory again.
The Redesigned Silverado 1500 Is Moving to Indiana and Mexico
The next-generation 2027 Silverado 1500 will be built at GM’s Fort Wayne Assembly operation in Indiana and its Silao plant in Mexico. Industry production reporting indicates that Silao is leading the launch with Crew Cab trucks, while Fort Wayne is expected to join the new-generation production schedule as the rollout expands. Oshawa is absent from that light-duty production plan, ending Canada’s role in final assembly of the Silverado 1500 once the outgoing model finishes its November run.
The change comes just as Chevrolet launches one of the truck’s largest redesigns in years. The 2027 Silverado receives an overhauled exterior and interior, revised technology and two new sixth-generation Small Block V8 engines. The available 6.6-litre V8 produces 481 horsepower and 501 lb-ft of torque, while a new 5.7-litre V8 produces 402 horsepower. Chevrolet says the truck will reach dealerships late in 2026. Canadian customers will still be able to buy the redesigned Silverado, but the light-duty trucks arriving at dealerships will no longer come from Oshawa.
The Decision Comes Only Five Years After Oshawa’s Comeback
The timing carries extra weight because Oshawa’s truck operation represents one of the more dramatic factory revivals in recent Canadian auto history. Vehicle assembly at the plant ended in December 2019 after GM announced a major North American restructuring. The sprawling facility shifted toward stamping, subassembly and other work, leaving the city without the full vehicle production that had defined generations of employment there.
That changed after GM and Unifor reached a deal to restart truck assembly. Production resumed in November 2021 with Silverado HD pickups, and light-duty Silverado 1500 assembly followed in 2022. By June 2026, GM said Oshawa had built more than 500,000 Chevrolet Silverado pickups since the restart, along with more than one million aftermarket parts. The scale of that comeback shows why losing one half of the plant’s current truck mix matters. Oshawa is not returning to its 2019 shutdown status, but the light-duty Silverado that helped rebuild volume after reopening is now being reassigned elsewhere in North America.
Heavy-Duty Trucks Are Now Oshawa’s Future
GM’s answer to the departing Silverado 1500 is to concentrate Oshawa more heavily on its larger and more specialized pickups. The plant already builds Chevrolet Silverado 2500HD and 3500HD models, and GM says output of Silverado HD trucks will rise after light-duty production stops. Heavy-duty pickups generally sell in smaller volumes than mainstream half-ton trucks, but they occupy an important part of GM’s highly profitable full-size pickup business and are widely used for commercial towing and heavy-work applications.
Oshawa will also gain the next generation of the GMC Sierra HD. The product commitment formed part of GM’s new collective agreement with Unifor, ratified in August. The automaker committed C$144 million to prepare Oshawa for the GMC program. Unifor Local 222 president Jeff Gray has said the union expects Sierra HD production by late 2028, although GM has not publicly confirmed an exact launch date. That future GMC allocation is particularly important because it gives Oshawa a second heavy-duty nameplate rather than leaving the plant dependent solely on Chevrolet HD volume once Silverado 1500 production disappears.
The Production Numbers Show What Oshawa Is Losing
AutoForecast Solutions vice-president Sam Fiorani expects Oshawa to produce roughly 114,000 trucks during 2026, with output divided almost evenly between light-duty Silverado 1500s and Silverado HD models. If that forecast proves close to the final result, the departing light-duty program represents tens of thousands of vehicles a year rather than a low-volume derivative disappearing quietly from the schedule.
The eventual Sierra HD allocation is meant to help rebuild that volume. Fiorani has estimated Oshawa could produce approximately 40,000 Sierra HD pickups during the model’s first year at the plant. Forecasts can change with demand, production schedules and broader economic conditions, so those numbers are not guaranteed company targets. They nonetheless illustrate the manufacturing challenge facing Oshawa: GM needs enough Silverado HD and future Sierra HD production to replace the capacity that had been occupied by light-duty trucks. For the people working two daily shifts, maintaining production volume matters almost as much as keeping a product name on the assembly line.
Workers Have Already Absorbed One Major Cut This Year
The November transition follows an earlier production reduction that directly affected workers. Oshawa moved to two shifts beginning February 2, 2026 after operating with three. GM said approximately 500 employees would be placed on layoff as part of that change. Unifor calculated the direct impact more broadly, saying more than 700 jobs were eliminated and that additional positions were affected in the surrounding supplier network.
When bargaining with GM began in August, Unifor said it represented approximately 2,750 members at the Oshawa operation. Securing enough future product to sustain the remaining workforce therefore became a central issue during contract talks. Local 222 president Jeff Gray has said the union pushed for the Sierra HD because Silverado HD alone might not provide enough volume to keep two shifts operating. That helps explain why GM’s statement that employment will remain unchanged after November matters so much. Workers have already experienced one substantial reduction; the new heavy-duty commitments are intended to prevent the loss of Silverado 1500 from triggering another.
Tariffs Have Changed the Economics of Where GM Builds Trucks
The production shift is unfolding during an extraordinary period in Canada-U.S. auto trade. Since April 2025, the United States has imposed a 25% tariff on imported automobiles under Section 232. For vehicles that qualify under CUSMA, manufacturers can have the tariff applied to the vehicle’s non-U.S. content rather than its entire value, subject to U.S. government rules. Canada responded with its own 25% tariffs on certain U.S.-assembled vehicles and the non-Canadian and non-Mexican content of qualifying American vehicles.
GM itself has acknowledged that tariffs affect manufacturing decisions. In discussing billions of dollars of additional U.S. factory investment, the company told shareholders that greater American production capacity would help reduce its tariff exposure. Unifor has been more explicit, repeatedly arguing that Oshawa production and jobs are being moved south because of the trade environment. GM has not publicly said that tariffs alone caused the Silverado 1500 decision, and Silao’s continued role shows that the manufacturing equation is more complex than simply relocating everything to the United States. Still, tariffs have become a major factor in the economics surrounding every cross-border vehicle allocation.
Canada Will Still Build Engines for the New Trucks
Oshawa’s loss of next-generation Silverado 1500 final assembly does not remove Canada entirely from the truck’s manufacturing chain. GM has committed C$691 million to its St. Catharines Propulsion operation in Ontario to support production of sixth-generation Small Block V8 engines for full-size trucks and SUVs. GM says St. Catharines will join Flint Engine Operations in Michigan and Tonawanda Propulsion in New York in producing the new engine family.
Those engines are central to the 2027 Silverado’s sales pitch. The new 5.7-litre and 6.6-litre V8s provide higher output while incorporating efficiency improvements, and the 6.6-litre is rated at 481 horsepower. The investment means a Silverado 1500 assembled in Indiana or Mexico may still contain a major powertrain produced by Canadian workers once St. Catharines capacity comes online. That does not replace the economic impact of final assembly in Oshawa, which supports a different set of jobs and suppliers, but it illustrates how deeply integrated the continental auto industry remains. A pickup’s assembly location tells only part of the story about where its components and manufacturing value originate.
Oshawa Has Nearly Half a Billion Dollars in Recent Truck Commitments
GM has continued putting money into Oshawa even as the product mix changes. In 2023, the company announced C$280 million to prepare the plant for next-generation internal-combustion full-size trucks. It followed that with another C$63 million in February 2026 for stamping upgrades and related work. The newly negotiated C$144-million Sierra HD commitment brings those recent Oshawa truck and manufacturing investments to approximately C$487 million.
GM says its total investment in Oshawa since 2020 has reached about C$1.5 billion, including the enormous effort required to restart vehicle assembly after the 2019 shutdown. Those figures are why the November announcement is more nuanced than a traditional plant-closure story. GM is simultaneously taking one high-volume product away and spending money to give the factory different work. For Oshawa, investment dollars matter most when they translate into stable production schedules and jobs. The next test is whether the heavy-duty strategy can provide enough sustained volume to make the recent spending—and the promise of continued two-shift employment—hold up over several model years.
The Stakes Extend Beyond a Single Ontario Factory
Canada’s auto industry is unusually exposed to what happens in the United States. Statistics Canada estimates that U.S. demand accounted for 76.4% of Canadian automobile and light-duty vehicle manufacturing output and the same share of payroll jobs in the industry in 2024. More than 93% of Canadian motor-vehicle exports went to the United States in 2025. That dependence means a change in American trade rules or a decision to relocate one model can quickly affect production, suppliers and employment north of the border.
The broader industry was already under pressure before this latest Oshawa confirmation. Statistics Canada reported that employment in Canadian motor-vehicle-parts manufacturing fell 9.3% between December 2024 and December 2025, while motor-vehicle manufacturing employment declined 1.3%. The Silverado decision therefore lands in an environment where every new vehicle allocation is closely watched. For Oshawa, the story now shifts from whether the light-duty truck is leaving—it is—to whether increased Silverado HD production and the future Sierra HD can preserve the manufacturing base that was rebuilt after 2021.
November Is an Ending, but Not Another Oshawa Shutdown
The last Oshawa-built Silverado 1500 will close a relatively short but productive chapter. The plant restarted truck assembly in late 2021, added the light-duty model the following year and passed the 500,000-truck mark by June 2026. Now, within months, the model that contributed heavily to that volume will be gone from the Canadian factory while its redesigned successor is produced in Indiana and Mexico.
What happens afterward will determine how consequential that loss becomes. GM currently says employment will remain unchanged. Silverado HD output is supposed to rise, C$144 million is committed to future Sierra HD production, and Oshawa still has substantial recent investment behind it. Those are meaningful protections, but they also make future production levels the key measure to watch. A plant can retain two shifts on paper only if enough trucks continue moving down the line. For workers in Oshawa, November will not mark the end of truck manufacturing. It will mark the beginning of a narrower, heavy-duty-focused future whose success depends on the volume GM ultimately assigns to Canada.
