2002 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 224

AM FM: Press this button to listen to the radio when a tape is playing. The inactive tape will remain in the player. CD AUX (Auxiliary): Press this button to play a tape when listening to the radio. The lighted arrow will appear next to the symbol and show the direction of play when a tape is active. Remote Cassette Tape Player Controls The following functions are controlled by the remote cassette tape player: PROG (Program): Press this button on the remote player to go from one side of the tape to the other. EJECT: Press this button on the remote player to remove the tape. EJECT can be used with either the ignition or radio off. Also, you must press EJECT before loading a cassette with the radio off to allow loading. Theft-Deterrent Feature (If Equipped) THEFTLOCKR is designed to discourage theft of your radio. It works by using a secret code to disable all radio functions whenever battery power is removed. 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 has been interrupted. If your battery loses power for any reason, you must unlock the radio with the secret code before it will operate. 3-22