2002 GMC Savana Van Owner's Manual - Page 185

Compact Disc Messages CHECK CD: If this message appears on the radio display, it could be due to one of the following reasons: Theft-Deterrent Feature RDS Radios (If Equipped) THEFTLOCKR is designed to discourage theft of your radio. The feature works automatically by learning a portion of the Vehicle Identification Number (VIN). If the radio is moved to a different vehicle, it will not operate and LOCKED will be displayed. When the radio and vehicle are turned off, the blinking red light indicates that THEFTLOCK is armed. With THEFTLOCK activated, your radio will not operate if stolen. D The road is too rough. The disc should play when the road is smoother. D The disc is dirty, scratched, wet or upside down. D The air is very humid. If so, wait about an hour and try again. If the CD is not playing correctly, for any other reason, try a known good CD. If any error occurs repeatedly or if an error can't be corrected, contact your dealer. If your radio displays an error message, write it down and provide it to your dealer when reporting the problem. Theft-Deterrent Feature Non-RDS Radios (If Equipped) THEFTLOCKR is designed to discourage theft of your radio. The feature works automatically by learning a portion of the Vehicle Identification Number (VIN). If the radio is moved to a different vehicle, it will not operate and LOC will be displayed. With THEFTLOCK activated, your radio will not operate if stolen. 3-46