1997 Buick Regal Owner's Manual - Page 187

AM-FM: Press this button to play the radio when a disc is in the player. Theft-Deterrent Feature THEFTLOCK" is designed to discourage theft of your radio. It works by using a secret code to disable all radio functions wheneverbattery power is removed. SOURCE: Press this button to change to the disc function when the radio is on. When a disc is inserted, the disc will play until you press AM-FM. Then the disc will stop playing and the radio will play. Press SOURCE again to play a disc again. CD PLAY will show on the display. If THEFTLOCK is active, the THEFTLOCK indicator will flash when the ignition is off. The THEFTLOCK feature for the radio may be used or ignored. If ignored, the system plays normally and the radio is not protected by the feature. If THEFTLOCK is activated, your radio will not operate if stolen. When THEFTLOCK is activated, the radio will display LOC to indicate a locked condition anytime battery power is removed. If your battery loses power for any reason, you must unlock the radio with the secret code before it will operate. EJECT Press this button to remove the disc. The radio will play. If you turn off the ignition or radio with a disc in the player, it will stay in the player. When you turn on the ignition or system, the disc will start playing where it stopped, if it was the last-selected audio source. Also, as aprotection feature, if a CD is ejected and left in the player, it will be pulled back in the player with the ignition on or off. If you leave a compactdisc in the player while listening to the radio, it may become warm. Activating the Theft-Deterrent Feature The instructions which follow, explain how to enter your secret code to activate the THEFTLOCK system. It is recommended that you read through all nine steps before starting the procedure.