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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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

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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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