Exhibit 99.1 PACCAR Inc Public Affairs Department P.O. Box 1518 Bellevue, WA 98009 Contact: Ken Hastings (425) 468-7530 ken.hastings@paccar.com April 29, 2025, Bellevue, Washington – "PACCAR reported good revenues and net income in the first quarter of 2025," said Preston Feight, chief executive officer. "Peterbilt, Kenworth and DAF delivered good results, PACCAR Parts delivered record revenue and strong profits, and PACCAR Financial Services achieved good results due to its high-quality portfolio. I am ver ...