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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HvkSE4ttG869WSYc38ur1P3mfdNXykmJBFFp3LK7bzdo3S8qTEtQUn71WQqukkRI
 PtoacpDPYaoGXp8RG3LMCA==

<SEC-DOCUMENT>0000075362-03-000139.txt : 20030703
<SEC-HEADER>0000075362-03-000139.hdr.sgml : 20030703
<ACCEPTANCE-DATETIME>20030703135320
ACCESSION NUMBER:		0000075362-03-000139
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030702
FILED AS OF DATE:		20030703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TEMBREULL MICHAEL A
		CENTRAL INDEX KEY:			0001191932

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14817
		FILM NUMBER:		03774858

	BUSINESS ADDRESS:	
		STREET 1:		PACCAR INC
		STREET 2:		P.O. BOX 1518
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98009

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PACCAR INC
		CENTRAL INDEX KEY:			0000075362
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTOR VEHICLES & PASSENGER CAR BODIES [3711]
		IRS NUMBER:				910351110
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		777 106TH AVE NE
		STREET 2:		PO BOX 1518
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004
		BUSINESS PHONE:		4254557383

	MAIL ADDRESS:	
		STREET 1:		777 106TH AVENUE NE
		STREET 2:		PO BOX 1518
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PACIFIC CAR & FOUNDRY CO
		DATE OF NAME CHANGE:	19720707
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
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<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-07-02</periodOfReport>
    <issuer>
        <issuerCik>0000075362</issuerCik>
        <issuerName>PACCAR INC</issuerName>
        <issuerTradingSymbol>PCAR</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001191932</rptOwnerCik>
            <rptOwnerName>TEMBREULL MICHAEL A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VICE CHAIRMAN</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeSecurity><securityTitle><value>COMMON STOCK (SIP)</value></securityTitle><transactionDate><value>2003-07-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1"/></transactionCoding><transactionAmounts><transactionShares><value>69</value><footnoteId id="F2"/></transactionShares><transactionValue><value>67.67</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>21306.9</value><footnoteId id="F2"/><footnoteId id="F3"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</valu
e></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeSecurity><derivativeSecurity><securityTitle><value>STOCK OPTION</value></securityTitle><conversionOrExercisePrice><value>35.85</value></conversionOrExercisePrice><transactionDate><value>2003-07-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F4"/></transactionCoding><transactionAmounts><transactionShares><value>0</value></transactionShares><transactionValue><value>0</value><footnoteId id="F5"/></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2002-01-01</value></exerciseDate><expirationDate><value>2009-04-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>32519</value>
</underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>32519</value><footnoteId id="F6"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>COMMON STOCK (LTIP)</value><footnoteId id="F7"/></securityTitle><conversionOrExercisePrice><value>0</value></conversionOrExercisePrice><transactionDate><value>2003-07-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F4"/></transactionCoding><transactionAmounts><transactionShares><value>0</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionA
mounts><exerciseDate><value>1988-08-08</value><footnoteId id="F7"/></exerciseDate><expirationDate><value>1988-08-08</value><footnoteId id="F7"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>19682</value><footnoteId id="F2"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>19682</value><footnoteId id="F2"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>COMMON STOCK (DICP)</value><footnoteId id="F8"/></securityTitle><conversionOrExercisePrice><value>0</value></conversionOrExercisePrice><transactionDate><value>2003-07-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J
</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F4"/></transactionCoding><transactionAmounts><transactionShares><value>0</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>1988-08-08</value><footnoteId id="F8"/></exerciseDate><expirationDate><value>1988-08-08</value><footnoteId id="F8"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value></underlyingSecurityTitle><underlyingSecurityShares><value>13150.3</value><footnoteId id="F2"/></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>13150.3</value><footnoteId id="F2"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivat
iveSecurity><footnotes><footnote id="F1">June 5, 2002 dividend on PACCAR Savings Investment Plan (SIP) shares reinvested pursuant to SIP.  SIP information based on most recent report from SIP Trustee - received July 2, 2002.</footnote><footnote id="F2">Fractional shares rounded to nearest 1/10.</footnote><footnote id="F3">Reporting Person also holds 14,016 shares of common stock outside SIP.</footnote><footnote id="F4">Holding unchanged.  Transaction code and date are used to force the system to report the holding.</footnote><footnote id="F5">Awarded pursuant to PACCAR Long Term Incentive Plan (LTIP).</footnote><footnote id="F6">Reporting Person has additional options to purchase Common Stock as follows:  63,915 shares at $27.83 per share exercisable January 1, 2003 and expiring January 25, 2010; 57,633 shares at $34.42 exercisable January 1, 2004 and expiring January 24, 2011; 47,934 shares at $42.31 exercisable January 1, 2005 and expiring January 23, 2012; and 44,332 shares at $47.10 exercisable January 1
, 2006 and expiring January 15, 2013.</footnote><footnote id="F7">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.  </footnote><footnote id="F8">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.</footnote></footnotes><ownerSignature><signatureName>M. A. Tembreull</signatureName><signatureDate>2003-07-03</signatureDate></ownerSignature></ownershipDocument>

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