THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

PACCAR Inc. (PCAR)

3/14/2006 Proxy Information

James Pigott is the uncle of Mark C. Pigott, a director of the Company.

3/18/2005 Proxy Information

James Pigott is the uncle of Mark C. Pigott, a director of the Company.

3/15/2004 Proxy Information

David J. Hovind served as Vice Chairman of PACCAR Inc. from January 2003 until January 11, 2004. Previously, he was President from January 1992 to January 2003, Executive Vice President from July 1987 to January 1992, Senior Vice President from December 1985 to July 1987 and Vice President from September 1985 to December 1985.

James C. Pigott is the uncle of Mark C. Pigott.

2003 Proxy Information

James C. Pigott is the uncle of Mark C. Pigott.