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Truck makers sue California in bid to abandon zero-emissions agreements

Truckmakers challenge California's 2023 emissions deal citing conflict with federal law and seek court rulings on the Clean Truck Partnership's constitutionality under the federal supremacy clause.

  • Nebraska Attorney General Mike Hilgers claimed victory Monday as a judge approved dismissing his lawsuit against major semitruck manufacturers over a zero-emission vehicle agreement with California.
  • The lawsuit challenged the 2023 Clean Truck Partnership pact that required manufacturers to sell zero-emission trucks in states adopting California's stricter emissions standards, amid ongoing federal and state authority disputes.
  • Hilgers characterized the agreement as a coordinated effort across the industry to entirely eliminate fossil fuel-powered trucks, expressing concern that it would lead to higher costs and compel trucking companies to finance the shift to zero-emission vehicles.
  • The suit sought declarations the Partnership violated the Clean Air Act’s supremacy clause, while the Trump administration had rolled back EPA waivers California sought and signed resolutions expressing disapproval.
  • The dismissal ends a multi-front conflict over emissions rules, with Hilgers stating the victory ensures truck costs and availability will be decided by market forces, not unelected officials in another state.
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truckingdive.com broke the news in on Tuesday, August 12, 2025.
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