EXHIBIT 99.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Quarterly Report of American Axle & Manufacturing Holdings, Inc. (the "Issuer") on Form 10-Q for the period ending March 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Richard E. Dauch, Co-Founder, Chairman of the Board & Chief Executive Officer of the Issuer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: 1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Issuer. By: /s/ Richard E. Dauch ------------------------------- Richard E. Dauch Co-Founder, Chairman of the Board & Chief Executive Officer May 12, 2003 This certification accompanies this Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the Issuer for purposes of Section 18 of the Securities Exchange Act of 1934, as amended. A signed original of this written statement required by Section 906 has been provided to American Axle & Manufacturing Holdings, Inc. and will be retained by American Axle & Manufacturing Holdings, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. 24