PACCAR INC — Director's Dealing 2004

Sep 9, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PACCAR INC (PCAR)
CIK: 0000075362
Period of Report: 2004-09-07

Reporting Person: PLIMPTON THOMAS E (PRESIDENT)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-09-07	COMMON STOCK (LTIP)	$	J	8.8	Acquired		COMMON STOCK (8.8)	Direct
2004-09-07	COMMON STOCK (DICP)	$	J	5	Acquired		COMMON STOCK (5)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
COMMON STOCK (SIP)	16048.6	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
STOCK OPTION	$22.94	2011-01-24	COMMON STOCK (42107)	42107	Direct
STOCK OPTION	$28.20	2012-01-23	COMMON STOCK (40263)	40263	Direct
STOCK OPTION	$31.40	2013-01-15	COMMON STOCK (45168)	45168	Direct
STOCK OPTION	$56.95	2014-01-15	COMMON STOCK (24558)	24558	Direct

Footnotes

F1: Shares held in PACCAR Savings Investment Plan (SIP). SIP information based on most recent report from SIP trustee.

F2: Option to buy awarded under PACCAR Long Term Incentive Plan (LTIP).

F3: Share units held in deferred phantom stock account under LTIP convertible to common stock on a one-for-one basis upon satisfaction of all applicable vesting conditions.

F4: Dividend on share units held in deferred phantom stock account under LTIP reinvested pursuant to LTIP.

F5: Share units held in deferred phantom stock account under PACCAR Deferred Incentive Compensation Plan (DICP) convertible to common stock on a one-for-one basis upon satisfaction of all applicable vesting conditions.

F6: Dividend on share units held in deferred phantom stock account under DICP reinvested pursuant to DICP.