Overview

• Trump postponed an initially signaled Oct. 1 start after automakers and industry executives warned about costs and supply-chain strain.
• The tariff follows an investigation covering trucks over 10,000 pounds and parts that cited a small number of foreign suppliers and alleged predatory practices.
• Mexico and Canada are the largest sources of roughly 245,000 imported trucks worth about $20 billion last year, with some North American vehicles qualifying for USMCA tariff-free treatment if content thresholds are met.
• Companies with notable exposure include Daimler Truck’s Freightliner, Volvo Group’s Mack, Paccar’s Peterbilt and Kenworth, and Stellantis models built in Mexico.
• Business groups caution the costs will be passed through to customers as the Supreme Court readies Nov. 5 arguments on separate challenges to Trump’s broader tariff program.