UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

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FORM 10-K

FOR ANNUAL AND TRANSITION REPORTS
PURSUANT TO SECTIONS 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

(Mark One)

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2004

/ / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURI-
TIES EXCHANGE ACT OF 1934

For the transition period from ________ to ________

Commission File Number: 001-31876

Lehman ABS Corporation,
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on behalf of:
Corporate Backed Trust Certificates, Series 2001-23 Trust
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(Exact name of registrant as specified in its charter)

Delaware 13-3447441
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(State or other jurisdiction of (I.R.S. Employer Identification No.)
incorporation or organization)

745 Seventh Avenue, New York, New York 10019
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(Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code: (212) 526-7000

Securities registered pursuant to Section 12(b) of the Act:

Title of Class Name of Registered Exchange
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Corporate Backed Trust Certificates, Series 2001-23 New York Stock Exchange
("NYSE")

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark whether the registrant: (1) Has filed all reports
required to be filed by section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant

was required to file such reports), and (2) has been subject to file
requirements for the past 90 days Yes /X/ No / /

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to
this Form 10-K. /X/

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Act).
Yes / / No /X/

State the aggregate market value of the voting and non-voting common equity
held by non-affiliates computed by reference to the price at which the common
equity was last sold, or the average bid and asked price of such common equity,
as of the last business day of the registrant's most recently completed second
fiscal quarter:

The registrant has no voting stock or class of common stock that is held
by non-affiliates.

DOCUMENTS INCORPORATED BY REFERENCE

The distribution reports to security holders filed on Form 8-K during the
fiscal year in lieu of reports on Form 10-Q which includes the reports filed on
Form 8-K listed in Item 15(a) hereto.

Introductory Note

Lehman ABS Corporation (the "Depositor") is the Depositor in respect of the
Corporate Backed Trust Certificates, Series 2001-23 Trust (the "Trust"), a
common law trust formed pursuant to the Standard Terms for Trust Agreements,
dated as of January 16, 2001, between the Depositor and U.S. Bank Trust
National Association, as trustee (the "Trustee"), as supplemented by a Series
Supplement (the "Series Supplement") dated as of June 1, 2001 in respect of the
Trust. The Trust's assets consist solely of debentures issued by Ryder System,
Inc. The Certificates do not represent obligations of or interests in the
Depositor or the Trustee.

Ryder System, Inc., the issuer of the underlying securities, is subject to the
information reporting requirements of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"). For information on the issuer of the underlying
securities, please see its periodic and current reports filed with the
Securities and Exchange Commission (the "Commission") under Ryder System,
Inc.'s Exchange Act file number, 001-04364. The Commission maintains a site on
the World Wide Web at "http://www.sec.gov" at which users can view and download
copies of reports, proxy and information statements and other information filed
electronically through the Electronic Data Gathering, Analysis and Retrieval
system, or "EDGAR." Periodic and current reports and other information required
to be filed pursuant to the Exchange Act by the issuer of the underlying
securities may be accessed on this site. Neither the Depositor nor the Trustee
has participated in the preparation of such reporting documents, or made any
due diligence investigation with respect to the information provided therein.
Neither the Depositor nor the Trustee has verified the accuracy or completeness
of such documents or reports. There can be no assurance that events affecting
the issuer of the underlying securities or the underlying securities have not
occurred or have not yet been publicly disclosed which would affect the
accuracy or completeness of the publicly available documents described above.

PART I

Item 1. Business.
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Not Applicable

Item 2. Properties .
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Not Applicable

Item 3. Legal Proceedings.
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None

Item 4. Submission of Matters to a Vote of Security Holders.
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None

PART II

Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and
Issuer Purchases of Equity Securities.
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The publicly offered Certificates representing investors' interest in
the Trust are represented by one or more physical Certificates registered in the
name of "Cede & Co.", the nominee of The Depository Trust Company. Those
publicly offered Certificates are listed on the NYSE.

Item 6. Selected Financial Data.
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Not Applicable

Item 7. Management's Discussion and Analysis of Financial Condition and Results
of Operation.
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Not Applicable

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
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Not Applicable

Item 8. Financial Statements and Supplementary Data.
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Not Applicable

Item 9. Changes in and Disagreements With Accountants on Accounting and
Financial Disclosure.
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None

Item 9A. Controls and Procedures.
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Not Applicable

Item 9B. Other Information.
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None

PART III

Item 10. Directors and Executive Officers of the Registrant.
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Not Applicable

Item 11. Executive Compensation.
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Not Applicable

Item 12. Security Ownership of Certain Beneficial Owners and Management.
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Not Applicable

Item 13. Certain Relationships and Related Transactions.
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None

Item 14. Principal Accounting Fees and Services.
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Not Applicable

PART IV

Item 15. Exhibits, Financial Statement Schedules.
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(a) The following documents have been filed as part of this report.

1. Trustee's Distribution Statements documented on Form 8-K
regarding the distributions from the Trust to the
certificateholders for the period from January 1, 2004
through and including December 31, 2004 have been filed
with the Securities and Exchange Commission and are hereby
incorporated by reference. Filing dates are listed below:

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Trust Description Distribution Date Filed on
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Corporate Backed Trust Certificates, 6/01/2004 6/14/2004
Series 2001-23 Trust 12/01/2004 12/14/2004

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2. None.

3. Exhibits:

99.1 - Certification by Vice President of the Registrant
pursuant to 15 U.S.C. Section 7241, as adopted pursuant to
Section 302 of the Sarbanes-Oxley Act of 2002.

99.2 - Annual Compliance Report by Trustee pursuant to 15
U.S.C. Section 7241, as adopted pursuant to Section 302 of
the Sarbanes-Oxley Act of 2002.

(b) See Item 15(a) above.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

Lehman ABS Corporation, as Depositor for the
Trust (the "Registrant")

Dated: March 28, 2005 By: /s/ CHARLES M. WEAVER
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Name: Charles M. Weaver
Title: Vice President

EXHIBIT INDEX

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Reference Description of Exhibits Exhibit Number
Number per in this Form
Item 601 of 10-K
Regulation
SK
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(99.1) Certification by Vice President of the 99.1
Registrant pursuant to 15 U.S.C. Section
7241, as adopted pursuant to Section 302 of
the Sarbanes-Oxley Act of 2002.
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(99.2) Annual Compliance Report by Trustee pursuant 99.2
to 15 U.S.C. Section 7241, as adopted
pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002.
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