Overview

• Four leading manufacturers—Daimler, Volvo, PACCAR and International Motors—filed a complaint in the U.S. District Court in Sacramento seeking to block enforcement of California’s heavy-duty truck emissions standards.
• The complaint requests a declaratory judgment, an injunction to prevent the California Air Resources Board from enforcing its heavy-duty truck emissions standards, including zero-emission sales requirements.
• The Federal Trade Commission closed its antitrust probe after the manufacturers committed to abandon the July 2023 Clean Truck Partnership, declaring it unenforceable.
• California has launched a separate lawsuit to restore its waiver authority under the Clean Air Act after Biden-era EPA approvals were repealed in June.
• Manufacturers say conflicting federal resolutions and state mandates have created market uncertainty that impedes planning for zero-emission truck production.