EXHIBIT 99(b)


                                 TXU GAS COMPANY
                       Certificate Pursuant to Section 906
                         of Sarbanes - Oxley Act of 2002


    The undersigned, Scott Longhurst, Principal Financial Officer of TXU
Gas Company (the "Company"), DOES HEREBY CERTIFY that:

 1. The Company's Annual Report on Form 10-K for the year ended December
    31, 2002 (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 operation of the
    Company.

    IN WITNESS WHEREOF, the undersigned has caused this instrument to be
executed this 28th day of March, 2003.


                        /s/  Scott Longhurst
                     -----------------------------------
                     Name:   Scott Longhurst
                     Title:  Principal Financial Officer