PACCAR Inc (PACCAR) designs, manufactures, and distributes light, medium, and heavy-duty trucks. It also designs and manufactures advanced diesel engines; provides financial services and information technology; and distributes truck parts related to its business.

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PACCAR’s R&D efforts focus on new product development, enhancement of manufacturing facilities, and aftermarket support programs. The company invests in aerodynamic truck models, integrated powertrains that include diesel, electric, hybrid, and hydrogen fuel cell technologies, advanced driver assistance systems, digital services, and next-generation manufacturing and distribution capabilities. It operates R&D centers for product testing in Washington, the US, and the Netherlands. In FY2023, the company incurred R&D expenses of US$410.9 million, which as a percentage of revenue, stood at 1.2%.