FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
PIGOTT MARK C
(Last)(First)(Middle)
777 106TH AVENUE NE
(Street)
BELLEVUEWA98004
(City)(State)(Zip)
2. Issuer Name and Ticker or Trading Symbol
PACCAR INC [PCAR]		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
CHAIRMAN & CEO
3. Date of Earliest Transaction (Month/Day/Year)
09/05/2008
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code
(Instr. 8)		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		7. Nature of Indirect Beneficial Ownership
(Instr. 4)
CodeVAmount(A) or (D)Price
COMMON STOCK         2,895,444 D  
COMMON STOCK         123,286 I WIFE & CHILDREN
COMMON STOCK         1,308,892 I (1) EASCLIFFE COMPANY
COMMON STOCK (SIP) (2)         62,309.925 D  

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		6. Date Exercisable and Expiration Date
(Month/Day/Year)		7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		8. Price of Derivative Security
(Instr. 5)		9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		11. Nature of Indirect Beneficial Ownership
(Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
STOCK OPTION (3) $ 10.62       01/01/200204/27/2009 COMMON STOCK 310,870   310,870 D  
STOCK OPTION (3) $ 8.25       01/01/200301/25/2010 COMMON STOCK 351,298   351,298 D  
STOCK OPTION (3) $ 10.2       01/01/200401/24/2011 COMMON STOCK 342,339   342,339 D  
STOCK OPTION (3) $ 12.54       01/01/200501/23/2012 COMMON STOCK 284,724   284,724 D  
STOCK OPTION (3) $ 13.96       01/01/200601/15/2013 COMMON STOCK 248,427   248,427 D  
STOCK OPTION (3) $ 25.31       01/01/200701/15/2014 COMMON STOCK 135,067   135,067 D  
STOCK OPTION (3) $ 32.11       01/01/200801/20/2015 COMMON STOCK 173,043   173,043 D  
STOCK OPTION (3) $ 32.23       01/01/200901/26/2016 COMMON STOCK 147,343   147,343 D  
STOCK OPTION (3) $ 44.56       01/01/201001/31/2017 COMMON STOCK 112,266   112,266 D  
STOCK OPTION (3) $ 45.74       01/01/201101/30/2018 COMMON STOCK 98,956   98,956 D  
COMMON STOCK (LTIP) (4) (4) 09/05/2008 J(5)  144.36   (4) (4) COMMON STOCK 144.36 $ 41.88 33,732.13 D  
COMMON STOCK (DICP) (6) (6) 09/05/2008 J(7)  359.78   (6) (6) COMMON STOCK 359.78 $ 41.88 84,068.89 D  
COMMON STOCK (DCP) (8) (8) 09/05/2008 J(9)  109.99   (8) (8) COMMON STOCK 109.99 $ 41.88 25,701.61 D  
Explanation of Responses:
1. Shares held by a corporation in which Reporting Person is a shareholder. Holding is reported voluntarily as Reporting Person is not a controlling shareholder and has no voting or investment power with respect to the Issuer's securities.
2. Shares held in PACCAR Savings Investment Plan (SIP).
3. Option to buy awarded under PACCAR Long Term Incentive Plan (LTIP).
4. 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 conditions.
5. Dividend on share units held in deferred phantom stock account under LTIP reinvested pursuant to LTIP.
6. 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 conditions.
7. Dividend on share units held in deferred phantom stock account under DICP reinvested pursuant to DICP.
8. Share units held in deferred phantom stock account under PACCAR Deferred Compensation Plan (DCP) convertible to common stock on a one-for-one basis upon satisfaction of all applicable conditions.
9. Dividend on share units held in deferred phantom stock account under DCP reinvested pursuant to DCP.
Mark C. Pigott09/09/2008
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.



 
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