SUBJECT COMPANY:

COMPANY DATA:
        COMPANY CONFORMED NAME:        XM SATELLITE RADIO HOLDINGS INC
        CENTRAL INDEX KEY:             0001091530
        STANDARD INDUSTRIAL
                CLASSIFICATION:        COMMUNICATION SERVICES, NEC [4899]
        IRS NUMBER:                    541878819
        STATE OF INCORPORATION:        DE
        FISCAL YEAR END:               1231

        FILING VALUES:
                FORM TYPE:             SC 13D/A
                SEC ACT:               1934 Act
                SEC FILE NUMBER:       005-57011
                FILM NUMBER:           1804791

        BUSINESS ADDRESS:
                STREET 1:              1500 ECKINGTON PL NE
                CITY:                  WASHINGTON
                STATE:                 DC
                ZIP:                   20002
                BUSINESS PHONE:        2023804000

        MAIL ADDRESS:
                STREET 1:              1500 ECKINGTON PL NE
                CITY:                  WASHINGTON
                STATE:                 DC
                ZIP:                   20002

FILED BY:

COMPANY DATA:
        COMPANY CONFORMED NAME:        GENERAL MOTORS CORP
        CENTRAL INDEX KEY:             0000040730
        STANDARD INDUSTRIAL
                CLASSIFICATION:        MOTOR VEHICLES & PASSENGER
                                       CAR BODIES [3711]
        IRS NUMBER:                    380572515
        STATE OF INCORPORATION:        DE
        FISCAL YEAR END:               1231

        FILING VALUES:
                FORM TYPE:             SC 13D/A

        BUSINESS ADDRESS:
                STREET 1:              300 RENAISSANCE CTR
                STREET 2:              MAIL CODE: 482-C34-D71
                CITY:                  DETROIT
                STATE:                 MI
                ZIP:                   48265-3000
                BUSINESS PHONE:        3135565000

        MAIL ADDRESS:
                STREET 1:              300 RENAISSANCE CTR
                STREET 2:              MAIL CODE: 482-C34-D71
                CITY:                  DETROIT
                STATE:                 MI
                ZIP:                   48265-3000