SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) NAME OF ISSUER: Chevron Corporation TITLE OF CLASS OF SECURITIES: Chevron Corporation Common Stock CUSIP NUMBER 166751-100 Check the following box if a fee is being paid with this statement: [ ]CUSIP NO. 166751-100 (1) Names of Reporting Persons MELLON BANK CORPORATION SS or IRS Identification Nos. IRS No. 25-1233834 of Above Persons (2) Check the Appropriate Box (a) if a Member of a Group (See Instructions) (b) (3) SEC Use Only (4) Citizenship or Place United States of Organization Number of Shares (5) Sole Voting Beneficially Power 6,306,000 Owned by Each Reporting Person With (6) Shared Voting Power 85,731,297 (7) Sole Dispositive Power 6,152,000 (8) Shared Dispositive Power 1,535,000 (9) Aggregate Amount Beneficially Owned by Each Reporting Person 92,869,297 (10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) (11) Percent of Class Represented 14.25 by Amount in Row (9) (12) Type of Reporting Person HC (See Instructions) - 2(a) - CUSIP NO. 166751-100 (1) Names of Reporting Persons MELLON BANK N.A. SS or IRS Identification Nos. IRS No. 25-0659306 of Above Persons (2) Check the Appropriate Box (a) if a Member of a Group (See Instructions) (b) (3) SEC Use Only (4) Citizenship or Place United States of Organization Number of Shares (5) Sole Voting Beneficially Power 3,155,000 Owned by Each Reporting Person With (6) Shared Voting Power 85,642,297 (7) Sole Dispositive Power 3,058,000 (8) Shared Dispositive Power 611,000 (9) Aggregate Amount Beneficially Owned by Each Reporting Person 88,851,297 (10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) (11) Percent of Class Represented 13.63 by Amount in Row (9) (12) Type of Reporting Person BK (See Instructions) - 2(b) - CUSIP NO. 166751-100 (1) Names of Reporting Persons CHEVRON CORP DEFINED CONTRIBUTION MASTER PENSION TRUST SS or IRS Identification Nos. IRS No. 25-6263977 of Above Persons (2) Check the Appropriate Box (a) if a Member of a Group (See Instructions) (b) (3) SEC Use Only (4) Citizenship or Place United States of Organization Number of Shares (5) Sole Voting Beneficially Power 0 Owned by Each Reporting Person With (6) Shared Voting Power 85,182,297 (7) Sole Dispositive Power 0 (8) Shared Dispositive Power 0 (9) Aggregate Amount Beneficially Owned by Each Reporting Person 85,182,297 (10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) (11) Percent of Class Represented 13.07 by Amount in Row (9) (12) Type of Reporting Person EP (See Instructions) - 2(c) - SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Under the Securities and Exchange Act of 1934) Item 1(a) Name of Issuer: Chevron Corporation Item 1(b) Address of Issuer's Principal Executive Offices: 225 Bush Street San Francisco, CA 94104 Item 2 (a) Name of Person Filing: Mellon Bank Corporation and any other reporting person(s) identified on the second part of the cover page(s). Item 2(b) Address of Principal Business Office, or if None, Residence: c/o Mellon Bank Corporation One Mellon Bank Center Pittsburgh, Pennsylvania 15258 (for all reporting persons) Item 2(c) Citizenship: United States Item 2(d) Title of Class of Securities: Chevron Corporation Common Stock Item 2(e) CUSIP Number: 166751-100 Item 3 See Item 12 of cover page(s) ("Type of Reporting Person") for each reporting person. BK = Bank as defined in Section 3(a)(6) of the Act IV = Investment Company registered under Section 8 of the Investment Company Act IA = Investment Advisor registered under Section 203 of the Investment Advisers Act of 1940 - 3 - SCHEDULE 13G (Continued) EP = Employee Benefit Plan, Pension Fund which is subject to the provisions of the Employee Retirement Income Security Act of 1974 or Endowment Fund; see Section 240.13-d(1)(b)(1)(ii)(F) HC = Parent Holding Company, in accordance with Section 240.13-d(1)(b)(1)(ii)(G) Item 4 Ownership: See Items 5 through 9 and 11 of cover page(s) as to each reporting person. The amount beneficially owned includes, where appropriate securities not outstanding which are subject to options, warrants, rights or conversion privileges that are exercisable within 60 days. The filing of this Schedule 13G shall not be construed as an admission that Mellon Bank Corporation, or its direct or indirect subsidiaries, including Mellon Bank, N.A., are for the purposes of Section 13(d) or 13(g) of the Act, the beneficial owners of any securities covered by this Schedule 13G. Mellon Bank, N.A. is the trustee of the issuer's employee benefit plan (the "Plan"), which is subject to ERISA. The securities reported include all shares held of record by Mellon Bank, N.A. as trustee of the Plan. The reporting person, however, disclaims beneficial ownership of all shares that have been allocated to the individual accounts of employee participants in the Plan for which directions have been received and followed. Item 5 Ownership of Five Percent or Less of a Class: N/A Item 6 Ownership of More than Five Percent on Behalf of Another Person: All of the securities are beneficially owned by Mellon Bank Corporation or its direct and indirect subsidiaries in their various fiduciary capacities. As a result, another entity in every instance is entitled to dividends or proceeds of sale. The number of individual accounts holding an interest of 5% or more is 1, Chevron Corp Defined Contribution Master Pension Trust 85,182,297 shares = 13.07% - 4 - SCHEDULE 13G (Continued) Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported by the Parent Holding Company: See Exhibit I. Item 8 Identification and Classification of Members of the Group: N/A Item 9 Notice of Dissolution of Group: N/A Item 10 Certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. 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. This filing is signed by Mellon Bank Corporation on behalf of all reporting entities pursuant to Rule 13d-1(f)(1) promulgated under the Securities and Exchange Act of 1934, as amended. Date: January 19, 1995 MELLON BANK CORPORATION By /s/ Michael E. Bleier Michael E. Bleier General Counsel - 5 - EXHIBIT I The shares reported on the attached Form 13G are beneficially owned by the following direct or indirect subsidiaries of Mellon Bank Corporation, as marked (X): (A) X Boston Safe Deposit and Trust Company X Boston Safe Deposit and Trust Company of California X Boston Safe Deposit and Trust Company of New York X Mellon Bank, N.A. Mellon Bank (Delaware) National Association Mellon Bank (MD) (B) X Franklin Portfolio Associates Trust Laurel Capital Advisors X Mellon Capital Management Corporation Mellon Equity Associates X The Boston Company Advisors, Inc. The Boston Company Financial Strategies, Inc. X The Boston Company Asset Management, Inc. X The Dreyfus Corporation Dreyfus Management, Inc. The Item 3 classification of each of the subsidiaries listed under (A) above is "Item 3(b) Bank as defined in Section 3(a)(6) of the Act." The Item 3 classification of each of the subsidiaries listed under (B) above is "Item 3 (e) Investment Advisor registered under Section 203 of the Investment Advisers Act of 1940." - 6 - EXHIBIT II Each of the undersigned hereby authorizes Mellon Bank Corporation, in accordance with Rule 13d-1(f)(1) under the Securities Exchange Act of 1934, as amended (the "1934 Act"), to file, on behalf of the undersigned, any statement required to be signed by the undersigned, on Schedule 13G pursuant to Rule 13d-1 under the 1934 Act and any amendment thereto pursuant to Rule 13d-2 under the 1934 Act. Each of the undersigned represents that it is individually eligible to use Schedule 13G, and acknowledges its responsibility for the timely filing of such Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein. However, each of the undersigned is not responsible for the completeness or accuracy of the information concerning the other persons making the filing on Schedule 13G unless such undersigned knows or has reason to believe that such information is inaccurate. Date: January 19, 1995 MELLON BANK, N.A. /s/ Stephen A. Yoder Stephen A. Yoder Assistant General Counsel MELLON BANK, N.A. AS TRUSTEE OF CHEVRON CORPORATION DEFINED CONTRIBUTION MASTER PENSION TRUST /s/ Stephen A. Yoder Stephen A. Yoder Assistant General Counsel - 7 -