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U.S. imports of heavy duty trucks & chassis manufacturing (NAICS 336120) totaled $1.8B in July 2026, traded with 36 countries.
Importers of Heavy Duty Trucks & Chassis Manufacturing paid $257.0M in duties in July 2026 — an effective duty rate of 24% on $1.1B in dutiable value, based on actual customs collections rather than the published tariff schedule. Heavy Duty Trucks & Chassis Manufacturing imports of $1.8B in July 2026 ran 19% above the year-to-date monthly average of $1.5B.
Last updated: July 2026 dataManufacturing of heavy-duty trucks and chassis — covering cab-over-engine designs, conventional sleeper tractors, and vocational platforms — is a capital-intensive sector with long product cycles and highly specialized supplier networks. From a trade standpoint, steel and aluminum inputs used in frame and cab manufacturing are subject to Section 232 tariffs, which directly affects production costs for domestic assemblers sourcing foreign-origin structural materials. Engine, transmission, and axle components often cross the US-Canada-Mexico border multiple times during production, making USMCA tariff preference claims dependent on meticulous parts-level origin tracking. Manufacturers should maintain detailed supplier declarations to support both USMCA compliance and Section 232 exclusion requests where applicable.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
31.0K shipments/mo
Section 232 tariffs apply to imported steel and aluminum mill products, which are primary inputs for truck frames, cabs, and axle housings. Domestic manufacturers sourcing these materials from non-exempt countries face higher input costs. Country-specific exemptions and product exclusions exist but must be applied for separately and are subject to expiration.
USMCA origin certification for heavy-duty trucks requires a producer's certification or importer's knowledge supported by a bill of materials tracing regional value content to the part level. For vehicles, additional labor value content calculations are required. Manufacturers typically maintain supplier affidavits and net cost calculations as the core supporting documentation for CBP audit purposes.
NAICSSector 33
National industry 1 of 1 in naics industry 33612
National industry 336120 · $1.8B of $1.8B
Supplier Network
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Imports · July 2026
origin
Mexico and Canada together supply 94% of it.
customs district
Census does not publish district detail for this classification system.
destination
None recorded for this period.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$1.8BYoY · Pro
Exports
$653.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.