GM Service Manual Online
For 1990-2009 cars only
    • Although not a recommended practice, you may use a CD adapter kit with a cassette tape player.
    • The adapter kit cassette should begin playing like a regular audio cassette tape once inserted.
    • If the cassette immediately ejects, perform the following steps:
        1. Turn the radio off.
        2. Turn the ignition on.
        3. Press and hold the TAPE AUX button.
        4. Wait for the tape icon to flash on the display while holding the TAPE AUX button.
        5. Insert the adapter cassette again.

The adapter cassette will power up the radio and begin playing.

This override routine remains active until you press EJECT.