Exhibit 99.1 Contact: Ken Hastings (425) 468-7530 ken.hastings@paccar.com PACCAR Inc Public Affairs Department P.O. Box 1518 Bellevue, WA 98009 FOR IMMEDIATE RELEASE PACCAR Achieves Excellent Quarterly Revenues and Profits October 22, 2024, Bellevue, Washington– "PACCAR achieved excellent revenues and net income in the third quarter of 2024," said Preston Feight, chief executive officer. "PACCAR's truck and Parts operations achieved robust quarterly sales and profits due to industry-leading trucks and stron ...