SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                 SCHEDULE 13G
                                (Rule 13d-102)
UNDER THE SECURITIES EXCHANGE ACT OF 1934

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                           PURSUANT TO RULE 13d-2(b)



GROUP 1 AUTOMOTIVE INC.
--------------------------------------------------------------------------------
                                (Name of Issuer)


COMMON STOCK
--------------------------------------------------------------------------------
(Title of Class of Securities)


                                   398905109
--------------------------------------------------------------------------------
                                 (CUSIP Number)


June 28, 2004
--------------------------------------------------------------------------------
(Date of Event Which Requires Filing of this Statement)


     Check the  appropriate  box to  designate  the rule  pursuant to which this
Schedule is filed:

          [_]  Rule 13d-1(b)

          [x]  Rule 13d-1(c)

          [_]  Rule 13d-1(d)


----------
(1)  The  remainder  of this  cover  page  shall be filled  out for a  reporting
     person's  initial  filing on this form with respect to the subject class of
     securities,  and for any subsequent amendment containing  information which
     would alter the disclosures provided in a prior cover page.

     The  information  required in the remainder of this cover page shall not be
deemed to be "filed"  for the purpose of Section 18 of the  Securities  Exchange
Act of 1934 or otherwise  subject to the  liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


(SC13G-07/98)
CUSIP No. 398905109                 13G                 	Page 2 of 14 Pages


________________________________________________________________________________
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     AIC Limited

________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
________________________________________________________________________________
3.   SEC USE ONLY


________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Incorporated under the laws of Ontario, Canada

________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          2,248,700*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            2,248,700*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    2,248,700*

________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]

________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    10.00% of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

CO
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* See item 2(a) of this filing

CUSIP No. 1389061020                 13G                    Page 3 of 14 Pages


________________________________________________________________________________
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     AIC Investment Services Inc.

________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]
________________________________________________________________________________
3.   SEC USE ONLY


________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Incorporated under the laws of Ontario, Canada

________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          2,248,700*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            2,248,700*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    2,248,700*

________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]

________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    10.00% of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

IA
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* See item 2(a) of this filing

CUSIP No. 398905109                 13G                	 Page 4 of 14 Pages

________________________________________________________________________________
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     AIC American Focused Fund

________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]

________________________________________________________________________________
3.   SEC USE ONLY


________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Mutual fund trust organized under the laws of Ontario, Canada

________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          1,900,819*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            1,900,819*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,900,819*

________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]

________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    8.46% of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

OO
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* See item 2(a) of this filing

CUSIP No. 398905109                13G                	 Page 5 of 14 Pages


________________________________________________________________________________
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     AIC American Focused Corporate Class

________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]

________________________________________________________________________________
3.   SEC USE ONLY

________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Mutual fund trust organized under the laws of Ontario, Canada

________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          289,518*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            289,518*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    289,518*

________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]

________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    1.29% of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

OO
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* See item 2(a) of this filing

CUSIP No. 398905109               13G              		  Page 6 of 14 Pages


________________________________________________________________________________
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     AIC American Focused Plus Fund

________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]

________________________________________________________________________________
3.   SEC USE ONLY

________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Mutual fund trust organized under the laws of Ontario, Canada

________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          58,363*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            58,363*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    58,363*

________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]

________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    .26% of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

OO
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* See item 2(a) of this filing

CUSIP No. 398905109                 13G                    Page 7 of 14 Pages



1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Michael Lee-Chin

________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]

________________________________________________________________________________
3.   SEC USE ONLY

________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Canadian
________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          2,248,700*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            2,248,700*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    2,248,700*
________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]
________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    10.00* of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

IN
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


*See item 2(a) of this filing



CUSIP No. 398905109                 13G               	  Page 8 of 14 Pages


________________________________________________________________________________
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Portland Holdings Inc.
________________________________________________________________________________
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)  [_]
                                                                 (b)  [x]

________________________________________________________________________________
3.   SEC USE ONLY


________________________________________________________________________________
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

Incorporated under the laws of Ontario, Canada

________________________________________________________________________________
  NUMBER OF    5.   SOLE VOTING POWER
   SHARES           Nil
               _________________________________________________________________
BENEFICIALLY   6.   SHARED VOTING POWER
  OWNED BY          2,248,700*
               _________________________________________________________________
    EACH       7.   SOLE DISPOSITIVE POWER
  REPORTING         Nil
               _________________________________________________________________
   PERSON      8.   SHARED DISPOSITIVE POWER
    WITH            2,248,700*
________________________________________________________________________________
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    2,248,700*

________________________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

    Not applicable                                           [_]

________________________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

    10.00% of outstanding Common Shares*
________________________________________________________________________________
12.  TYPE OF REPORTING PERSON*

CO
________________________________________________________________________________
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* See item 2(a) of this filing

CUSIP No.  398905109               13G               		  Page 9 of 14 Pages

_______________________________________________________________________________
Item 1(a).  Name of Issuer:

Group 1 Automotive Inc.

_______________________________________________________________________________
Item 1(b).  Address of Issuer's Principal Executive Offices:

950 Echo Lane, Suite 100, Houston TX  77024

______________________________________________________________________________
Item 2(a).  Name of Person Filing:

 AIC Limited ("AIC") is a corporation incorporated under the laws of Ontario.
AIC's wholly owned subsidiary AIC Investment Services Inc. ("AISI") is the
portfolio manager of certain accounts (including the Funds) and AIC is the
manager and trustee of certain mutual funds in Ontario (collectively the
"Funds") which are owners of record of the securities of the Issuer.  AISI
is qualified to act as an investment adviser to the Funds in Ontario, Canada
pursuant to a registration under the Securities Act Ontario.  AISI is
registered as an investment adviser under Section 203 of the Investment
Advisers Act of 1940.  AIC as trustee of the Funds, shares with the Funds the
power to direct the voting and disposition of the shares of the Issuer held
by the Funds. Berkshire Securities Inc. is a corporation incorporated under
the federal laws of Canada and is a subsidiary of Portland Holdings.  Michael
Lee-Chin holds indirectly through his sole ownership of Portland Holdings Inc.
approximately 95% of the voting equity securities of AIC and consequently he
may be deemed under United States securities law to beneficially own the shares
of the Issuer held by AIC as trustee of the Funds and by the Funds, although he
disclaims beneficial ownership of such holding.  Mr. Lee-Chin is a citizen and
resident of Canada.

_______________________________________________________________________________
Item 2(b).  Address of Principal Business Office, or if None, Residence:

1375 Kerns Road, Burlington, Ontario, Canada L7R 4X8

_______________________________________________________________________________
Item 2(c).  Citizenship:

Michael Lee-Chin - Canadian
AIC Limited - Incorporated under the laws of Ontario, Canada
AIC Investment Services Inc. - Incorporated under the laws of Ontario, Canada
Portland Holdings Inc. - Incorporated under the laws of Ontario, Canada
Funds - certain mutual funds organized under the laws of Ontario, Canada
_______________________________________________________________________________
Item 2(d).  Title of Class of Securities:

Common Shares

_______________________________________________________________________________
Item 2(e).  CUSIP Number

398905109
_______________________________________________________________________________

CUSIP No. 398905109               13G                    Page 10 of 14 Pages



Item 3.  If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b)
         or (c), Check Whether the Person Filing is a:

(a)  [_]  Broker or dealer registered under Section 15 of the Exchange Act.

(b)  [_]  Bank as defined in Section 3(a)(6) of the Exchange Act.

(c)  [_]  Insurance company as defined in Section 3(a)(19) of the Exchange
               Act.

(d)  [_]  Investment company registered under Section 8 of the Investment
               Company Act.

(e)  [_]  An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);

(f)  [_]  An employee benefit plan or endowment fund in accordance with
               Rule 13d-1(b)(1)(ii)(F);

(g)  [_]  A parent holding company or control person in accordance with
               Rule 13d-1(b)(1)(ii)(G);

(h)  [_]  A savings association as defined in Section 3(b) of the Federal
               Deposit Insurance Act;

(i)  [_]  A church plan that is excluded from the definition of an
              investment company under Section 3(c)(13) of the Investment
               Company Act;

(j)  [_]  Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c), check this box. [x]






















CUSIP No. 398905109                13G                Page 11 of 14 Pages

Item 4.  Ownership.

     Provide  the  following  information  regarding  the  aggregate  number
and percentage of the class of securities of the issuer identified in Item 1.

     (a)  Amount beneficially owned:  2,248,700*

     (b)  Percent of class: 10.00*

     (c)  Number of shares as to which such person has:

          (i)   Sole power to vote or to direct the vote Nil,

          (ii)  Shared power to vote or to direct the vote 2,248,700*,

          (iii) Sole power to dispose or to direct the disposition of Nil,

          (iv)  Shared power to dispose or to direct the disposition of
                2,248,700*

          * See item 2(a)
________________________________________________________________________________
Item 5.  Ownership of Five Percent or Less of a Class.

         Inapplicable
________________________________________________________________________________
Item 6.  Ownership of More Than Five Percent on Behalf of Another Person.

         Inapplicable
________________________________________________________________________________
Item 7.  Identification and Classification of the Subsidiary which acquired
         the Security Being Reported on by the Parent Holding Company.

         Inapplicable
_______________________________________________________________________________
Item 8.  Identification and Classification of Members of the Group.

         Inapplicable
________________________________________________________________________________
Item 9.  Notice of Dissolution of Group.

         Inapplicable
________________________________________________________________________________
Item 10.  Certifications.


By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not
held for the purpose of or with the effect of changing or  influencing
the control of the issuer of the  securities and were not acquired and
are not held in connection with or as a participant in any transaction
having such purpose or effect.


CUSIP No. 398905109                 13G                Page 12 of 14 Pages

                                    SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true,
complete and correct.

June 28, 2004

AIC LIMITED

By    /s/Victoria J. Ringelberg     			6/28/2004
      Victoria J. Ringelberg, 		 		Date
	Chief Financial Officer


AIC INVESTMENT SERVICES INC.

By    /s/Victoria J. Ringelberg				06/28/2004
      Victoria J. Ringelberg, 				Date
	Chief Financial Officer


AIC LIMITED as trustee for the
AIC AMERICAN FOCUSED FUND

By    /s/Victoria J. Ringelberg				6/28/2004
      Victoria J. Ringelberg, 				Date
	Chief Financial Officer


AIC LIMITED as trustee for the
AIC AMERICAN FOCUSED CORPORATE CLASS

By    /s/Victoria J. Ringelberg				6/28/2004
      Victoria J. Ringelberg,					Date
	Chief Financial Officer


AIC LIMITED as trustee for the
AIC AMERICAN FOCUSED PLUS FUND

By    /s/Victoria J. Ringelberg				6/28/2004
      Victoria J. Ringelberg,					Date
	Chief Financial Officer


MICHAEL LEE-CHIN

By    /s/Victoria J. Ringelberg				6/28/2004
      Victoria J. Ringelberg,					Date
      Chief Financial Officer

Under Power of Attorney dated March 14, 2003.

CUSIP No. 398905109                  13G                Page 13 of 14 Pages


PORTLAND HOLDINGS INC.

By   /s/Victoria J. Ringelberg				6/28/2004
      Victoria J. Ringelberg,					Date
      Chief Financial Officer

Under Power of Attorney dated March 14, 2003.


Attention. Intentional misstatements or omissions of fact constitute
federal criminal violations (see 18 U.S.C. 1001).


POWER OF ATTORNEY

The undersigned does hereby appoint Jonathan Wellum and Victoria Ringelberg,
and each of them, acting singly, with full power of substitution, as the true
and lawful attorney of the undersigned, to sign on behalf of the undersigned in
respect of the ownership of equity securities held by the undersigned, directly
or beneficially, and to be reported pursuant to sections 13(d) and 13(g) of the
Securities and Exchange Act of 1934, as amended, and to execute joint filing
agreements with respect to such filings.

IN WITNESS WHEREOF, this Power of Attorney, has been executed as of the 14th day
of March, 2003.

/s/Michael Lee Chin
Michael Lee Chin


JOINT FILING AGREEMENT

The persons named below agree to the joint filing on behalf of each of
them of a Statement on Schedule 13G (including amendments thereto) with
respect to the Common Shares of Group 1 Automotive Inc. and further agree
that this Joint Filing Agreement be included as an Exhibit to such joint
filings.  In evidence thereof, the undersigned hereby execute this
Agreement as of the 28th day of June, 2004.


AIC LIMITED

By  /s/Victoria J. Ringelberg
    Victoria J. Ringelberg,
    Chief Financial Officer


AIC INVESTMENT SERVICES INC.

By    /s/Victoria J. Ringelberg
      Victoria J. Ringelberg,
	Chief Financial Officer



CUSIP No. 398905109                 13G                Page 14 of 14 Pages


AIC LIMITED as trustee for the
AIC AMERICAN FOCUSED FUND

By    /s/Victoria J. Ringelberg
      Victoria J. Ringelberg,
      Chief Financial Officer


AIC LIMITED as trustee for the
AIC AMERICAN FOCUSED CORPORATE CLASS

By    /s/Victoria J. Ringelberg
      Victoria J. Ringelberg,
      Chief Financial Officer


AIC LIMITED as trustee for the
AIC AMERICAN FOCUSED PLUS FUND

By    /s/Victoria J. Ringelberg
      Victoria J. Ringelberg
      Chief Financial Officer

MICHAEL LEE-CHIN

By  /s/Victoria J. Ringelberg
    Victoria J. Ringelberg,
    Chief Financial Officer

Under Power of Attorney dated March 14, 2003.


PORTLAND HOLDINGS INC.

By  /s/Victoria J. Ringelberg
    Victoria J. Ringelberg,
    Chief Financial Officer

Under Power of Attorney dated March 14, 2003.