The United Auto Workers union is crediting new federal tariffs with sparking a wave of hiring across the domestic auto industry. Detroit Diesel recently announced it would add a third shift, recall laid-off workers, and hire dozens of new employees following the implementation of a 25 percent tariff on heavy truck imports that took effect in October after months of UAW lobbying efforts.
UAW President Shawn Fain has championed these trade measures as essential tools for reversing decades of offshoring and rebuilding American manufacturing jobs. The union’s support for tariffs marks a notable shift in labor’s approach to trade policy, with Fain calling the measures “a step in the right direction” for workers despite widespread concerns from industry analysts about potential price increases and profit disruptions.
The developments at Detroit Diesel, where workers recently ratified a new contract with profit-sharing and cost-of-living adjustments, offer an early glimpse into how these trade policies might reshape employment in the auto sector. The question now is whether this hiring surge represents a sustained trend or a temporary response to changing market conditions.
Impact of New Tariffs on Auto Industry Hiring
The United Auto Workers is pointing to 25% tariffs on imported heavy trucks as a catalyst for job growth across the manufacturing sector. Detroit Diesel’s plant expansion and third shift restart demonstrate how the union believes strategic trade policies can reverse decades of offshoring.
UAW Advocacy and the Push for Strategic Tariffs
The United Auto Workers has lobbied for automotive tariffs for decades, viewing them as essential tools to counteract what UAW President Shawn Fain calls a “free trade disaster.” When President Donald Trump imposed 25% tariffs on heavy trucks in October 2025, Fain congratulated the administration for delivering results for heavy truck workers.
Fain described the tariffs as strategic measures designed to undo trade damage and bring back union jobs to U.S. soil. The union views these import duties as leverage to pressure companies into reinvesting in American workers rather than maintaining production overseas.
The UAW’s support for auto tariffs has created an unusual alliance with the Trump administration, despite the union’s previous criticism of the president on other policy matters.
Detroit Diesel’s Expansion and Job Recalls
Detroit Diesel announced plans to restart its third shift at its manufacturing facility that straddles Detroit and Redford Township. The Daimler-owned plant currently employs about 3,000 workers who produce heavy duty engines, axles, and transmissions for companies like Freightliner, Western Star, and Thomas Built Buses.
The facility will recall laid-off workers and add dozens of new positions following the implementation of the 25% tariff on imported heavy trucks. Daimler Truck North America has been navigating the impact of these trade policies since their introduction last fall.
The UAW called the expansion “the latest win for UAW members in the union’s fight for reshoring and reinvesting in good union jobs.”
Growth in Union Jobs and Profit-Sharing
Union-represented employees at Detroit Diesel overwhelmingly approved their most recent contract with a 99% ratification vote. The agreement reflects strong worker confidence in their manufacturing jobs and the facility’s future under current trade policies.
The UAW argues that tariffs serve as useful tools to inspire job growth in the United States, particularly for union-represented positions in the heavy truck industry. The union has pushed companies like Daimler to reinvest in American workers rather than pursuing layoffs while generating billions in profit.
Beyond Detroit Diesel, the strategy aims to secure better profit-sharing arrangements and wage structures for workers across the automotive manufacturing sector.
Reshoring Efforts and Manufacturing Job Gains
The tariffs have secured commitments from multiple automakers to expand their U.S. manufacturing footprints. Stellantis announced a $13 billion investment in Midwestern manufacturing operations in October, projecting about 25,000 jobs between facilities and surrounding suppliers.
General Motors pledged $4 billion to U.S. operations in June without providing specific job estimates. Ford committed nearly $5 billion, though the company expects 600 fewer jobs at its facilities, with affected employees receiving buyout offers.
The reshoring efforts extend beyond traditional Detroit Three automakers. The UAW is attempting to organize thousands of workers at foreign automakers and electric vehicle manufacturers as part of its broader strategy to secure workers’ futures during the industry’s transition to electrification.
Automotive tariffs on heavy trucks were not included in the tariffs the U.S. Supreme Court overturned in February, allowing them to remain in effect.
Challenges, Outcomes, and Industry Responses
The tariff implementation has created a complex landscape of financial pressures, production disruptions, and market uncertainties that affect automakers, workers, and consumers differently. While some facilities report hiring gains, others face mounting costs and operational challenges.
Profit Margins and Worker Earnings
UAW President Shawn Fain argues that the Detroit Three automakers have maintained strong profitability for over a decade and possess the financial capacity to absorb tariff costs without raising prices. He contends that any price increases represent corporate decisions rather than unavoidable consequences of trade policy.
The union views the tariffs as leverage for corporate accountability. Fain maintains that manufacturers should prioritize worker wages and domestic employment over short-term profit maximization. He points to underutilized facilities like Ford’s Flat Rock Assembly and Stellantis’ Warren Truck plant as evidence that companies can expand U.S. production without lengthy construction timelines.
However, industry analysts warn that the 25% tariff rate could significantly compress margins. Automakers face difficult choices between absorbing costs, reducing profit targets, or passing expenses to consumers through higher sticker prices.
Supply Chain Pressures and Layoffs
Despite the union’s optimistic stance, some UAW members face immediate job losses. Approximately 900 UAW workers began receiving layoff notices even as the union publicly supported the tariff measures. These layoffs highlight the uneven impact across different plants and production lines.
Supply chain disruptions compound the challenges. North American automotive manufacturing relies on cross-border component flows, making the 25% tariff particularly disruptive for integrated production networks. Parts manufactured in Canada or Mexico now face additional costs when entering the United States.
The situation creates tension between short-term pain and potential long-term gains. While some facilities reduce headcount due to immediate cost pressures, others prepare for expanded domestic production as companies reassess their manufacturing footprints.
Vehicle Prices and Car Sales Trends
Industry experts anticipate upward pressure on the average transaction price for new vehicles. The tariffs affect both imported finished vehicles and components used in domestic assembly, creating multiple cost layers that could reach consumers.
Edmunds and other automotive research firms track pricing trends closely as tariffs take effect. Car sales volumes may decline if manufacturers pass costs to buyers, potentially dampening the broader economic benefits that tariff supporters envision. Higher prices could particularly affect entry-level segments where price sensitivity runs highest.
The Detroit Free Press reported concerns that elevated vehicle prices might push some buyers toward used cars or delay purchases altogether. This dynamic could reduce production volumes even at domestic plants, offsetting some employment gains from reshored manufacturing.
Complexities of Trade Agreements and Policy Shifts
Fain draws parallels between current tariff debates and the 1993 implementation of NAFTA. He referenced initial optimistic projections about the North American Free Trade Agreement that failed to materialize, citing subsequent job losses, factory closures, and wage stagnation.
The UAW has documented that over 90,000 manufacturing facilities closed since NAFTA became law in 1994. The union blames trade agreements for devastating communities and forcing workers into lower-wage employment. The Big Three alone closed 65 facilities over 22 years following NAFTA’s implementation.
The current USMCA agreement modified some NAFTA provisions but maintained integrated North American production. The new tariffs represent a sharp departure from this framework, creating uncertainty about long-term trade policy direction and investment planning for manufacturers operating across borders.
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