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) 11/08/2011 (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 11/08/2011   M   284,724 A $ 12.54 3,182,013 D   COMMON STOCK 11/08/2011   S   284,724 D $ 43.71 2,897,289 D   COMMON STOCK               1,308,892 I (1) EASCLIFFE COMPANY COMMON STOCK               283,280 I WIFE AND CHILDREN COMMON STOCK (SIP) (2)               66,482.732 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 (3)

$ 12.54

11/08/2011

M

284,724

01/01/2005

01/23/2012

COMMON STOCK

284,724

(3)

0

D

STOCK OPTION (3)

$ 13.96

01/01/2006

01/15/2013

COMMON STOCK

248,427

248,427

D

STOCK OPTION (3)

$ 25.31

01/01/2007

01/15/2014

COMMON STOCK

135,067

135,067

D

STOCK OPTION (3)

$ 32.11

01/01/2008

01/20/2015

COMMON STOCK

173,043

173,043

D

STOCK OPTION (3)

$ 32.23

01/01/2009

01/26/2016

COMMON STOCK

147,343

147,343

D

STOCK OPTION (3)

$ 44.56

01/01/2010

01/31/2017

COMMON STOCK

112,266

112,266

D

STOCK OPTION (3)

$ 45.74

01/01/2011

01/30/2018

COMMON STOCK

98,956

98,956

D

STOCK OPTION (3)

$ 30.81

01/01/2012

01/31/2019

COMMON STOCK

194,004

194,004

D

STOCK OPTION (3)

$ 36.12

01/01/2013

02/02/2020

COMMON STOCK

134,492

134,492

D

STOCK OPTION (3)

$ 50.5

01/01/2014

02/03/2021

COMMON STOCK

92,832

92,832

D

COMMON STOCK (LTIP) (4)

(4)

(4)

(4)

COMMON STOCK

35,520.131

35,520.131

D

COMMON STOCK (DICP) (5)

(5)

(5)

(5)

COMMON STOCK

88,525.0302

88,525.0302

D

COMMON STOCK (DCP) (6)

(6)

(6)

(6)

COMMON STOCK

27,063.9442

27,063.9442

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 by David C. Anderson POA		11/09/2011
**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)	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)	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.
(6)	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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