Exhibit 99(b)


                                 TXU US HOLDINGS COMPANY
                           Certificate Pursuant to Section 906
                             of Sarbanes - Oxley Act of 2002
                                   CERTIFICATION OF PFO


         The undersigned, H. Dan Farell, Principal Financial Officer of
TXU US Holdings Company (the "Company"), DOES HEREBY CERTIFY that:

     1.  The Company's Current Report on Form 8-K related to TXU Energy Company
         LLC filed on or about May 20, 2003 (the "Report") fully complies with
         the requirements of section 13(a) or 15(d) of the Securities Exchange
         Act of 1934, as amended; and

     2.  Information  contained in the Report fairly presents,  in all material
         respects,  the financial  condition and results of operations of
         TXU Energy Company LLC.

         IN WITNESS WHEREOF, the undersigned has caused this instrument to be
executed this 20th day of May, 2003.





                                    /s/  H. Dan Farrell
                                  ------------------------------------
                                  Name:  H. Dan Farell
                                  Title: Principal Financial Officer











A signed original of this written statement required by Section 906 has
been provided to TXU US Holdings Company and will be retained by TXU US Holdings
Company and furnished to the Securities and Exchange Commission or its staff
upon request.