Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
PIGOTT MARK C
  2. Issuer Name and Ticker or Trading Symbol
PACCAR INC [PCAR]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CHAIRMAN & CEO
(Last)
(First)
(Middle)
777 106TH AVENUE NE
3. Date of Earliest Transaction (Month/Day/Year)
10/10/2008
(Street)

BELLEVUE, WA 98004
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
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)
Code V Amount (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) 10/10/2008   J(3)   0.708 A $ 40.94 62,310.633 D  
COMMON STOCK (SIP) 10/10/2008   J(4)   270.591 A $ 41.45 62,581.224 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Security 3. 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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
STOCK OPTION (5) $ 10.62             01/01/2002 04/27/2009 COMMON STOCK 310,870   310,870 D  
STOCK OPTION (5) $ 8.25             01/01/2003 01/25/2010 COMMON STOCK 351,298   351,298 D  
STOCK OPTION (5) $ 10.2             01/01/2004 01/24/2011 COMMON STOCK 342,339   342,339 D  
STOCK OPTION (5) $ 12.54             01/01/2005 01/23/2012 COMMON STOCK 284,724   284,724 D  
STOCK OPTION (5) $ 13.96             01/01/2006 01/15/2013 COMMON STOCK 248,427   248,427 D  
STOCK OPTION (5) $ 25.31             01/01/2007 01/15/2014 COMMON STOCK 135,067   135,067 D  
STOCK OPTION (5) $ 32.11             01/01/2008 01/20/2015 COMMON STOCK 173,043   173,043 D  
STOCK OPTION (5) $ 32.23             01/01/2009 01/26/2016 COMMON STOCK 147,343   147,343 D  
STOCK OPTION (5) $ 44.56             01/01/2010 01/31/2017 COMMON STOCK 112,266   112,266 D  
STOCK OPTION (5) $ 45.74             01/01/2011 01/30/2018 COMMON STOCK 98,956   98,956 D  
COMMON STOCK (LTIP) (6) (6)               (6)   (6) COMMON STOCK 33,732.13   33,732.13 D  
COMMON STOCK (DICP) (7) (7)               (7)   (7) COMMON STOCK 84,068.89   84,068.89 D  
COMMON STOCK (DCP) (8) (8)               (8)   (8) COMMON STOCK 25,701.61   25,701.61 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
PIGOTT MARK C
777 106TH AVENUE NE
BELLEVUE, WA 98004
  X     CHAIRMAN & CEO  

Signatures

 Mark C. Pigott   10/14/2008
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(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) Interest on funds held in SIP pending investment in shares reinvested in shares September 16, 2008. (SIP information based on most recent report from SIP trustee - received October 10, 2008).
(4) September 5, 2008 dividend on PACCAR Savings Investment Plan (SIP) shares reinvested pursuant to SIP. (SIP information based on most recent report from SIP trustee - received October 10, 2008).
(5) Option to buy awarded under PACCAR Long Term Incentive Plan (LTIP).
(6) 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.
(7) 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.
(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.

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