This excerpt taken from the PCG 10-K filed Feb 18, 2005.
Participating Subsidiaries as of January 1, 1997
PG&E Gas Transmission Corporation
PG&E Gas Transmission, Texas Corporation
PG&E Gas Transmission TECO, Inc.
PG&E Energy Trading-Gas Corporation
PG&E Energy Services Corporation
And the U.S. subsidiaries of each of the above-named corporations.