2003 Chevrolet TrailBlazer Owner's Manual - Page 215

TUNE DISP: Press this control to see how long the current track has been playing. ET and the elapsed time will appear on the display. To change what is normally shown on the display (track or elapsed time), press the control until you see the display you want, then hold the control for two seconds. The radio will produce one beep. AM FM: Press this button to play the radio when a disc is in the player. The disc will stop but remain in the player. CD AUX: With a CD in the player and the radio playing, press this button to play a CD. Press AM FM to return to the radio when a CD is playing. The inactive CD will remain safely inside the radio for future listening. EJT: Press this button to remove the disc. The radio will play. Eject may be activated with either the ignition or radio off. CDs may be loaded with the radio and ignition off if this button is pressed first. Compact Disc Messages (Err): If you're driving on a very rough road or if it's very hot, the disc may not play and Err (error) may appear on the display. When the road becomes smooth or the temperature returns to normal, the disc should play. If the disc comes out, it could be one of the following: D The disc is upside down. D It is dirty, scratched or wet. D It is very humid. (If so, wait about an hour and try again.) If any error occurs repeatedly or if an error can't be corrected, please contact your dealer. (CAL ERR): This message is displayed when the radio has not been calibrated properly for the vehicle. You must return to the dealership for service. (LOCKED): This message is displayed when the THEFTLOCKR system has locked up. You must return to the dealership for service. 3-43