Tariffs, diesel and computer chips are driving up costs for automakers

by | Oct 29, 2026 | Top Stories

Tariffs, diesel and computer chips are driving up costs for automakers

Major U.S. automakers are reporting mixed results in their third quarter earnings, with General Motors, Ford, and Stellantis all posting revenue gains compared to the prior year. The companies attributed strong performance partly to robust sales of light-duty trucks and pickup vehicles, which command higher profit margins. GM reported a 9% increase in light-duty truck sales, while Stellantis saw U.S. pickup sales rise 34%. Ford’s F-Series trucks remained a top seller. Overall, consumers continued purchasing vehicles despite economic headwinds, with average new vehicle transaction prices reaching just over $50,000 in September.

However, automakers warned investors of significant cost challenges ahead. Steel, copper, and computer memory chips—all essential to vehicle production—have all become substantially more expensive. GM projected materials and logistics costs, including computer chips and diesel expenses, would create a $2 billion headwind this year, while Ford cited a similar $2 billion year-over-year cost disadvantage. Stellantis executives similarly highlighted pressure from rising memory chip and raw material prices as an industry-wide issue.

Tariffs implemented since 2025 have contributed substantially to rising material costs. Steel and aluminum used in vehicle frames and components, as well as copper essential for wiring and electric vehicle batteries, face additional import duties. Elevated diesel fuel prices also increased logistics expenses, as vehicles must be transported from factories to dealerships via truck. The intertwined U.S.-Canada supply chain, where parts frequently cross the border during manufacturing, faces additional strain from both higher fuel costs and tariffs on Canadian goods.

The cost pressures arrive as the industry grapples with reduced electric vehicle demand following the expiration of the federal $7,500 EV tax credit on September 30, 2025. Tesla and other EV manufacturers saw sales decline, prompting GM to announce plans for right-sizing its EV production capacity. Industry analysts noted that automaking’s traditionally slow planning cycles make rapid adaptation to tariffs and supply chain disruptions particularly challenging for manufacturers accustomed to stable operating environments.

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