2007 Chevrolet Tahoe Owner's Manual - Page 336

Radio Display Message Condition CAT Not Found No channel available for the chosen category XM TheftLocked Theft lock active XM Radio ID Unknown Check XM Receivr XM Not Available Action Required There are no channels available for the selected category. The system is working properly. The XM™ receiver in the vehicle could have previously been in another vehicle. For security purposes, XM™ receivers cannot be swapped between vehicles. If this message appears after having your vehicle serviced, check with your dealer. Radio ID label (channel 0) If tuned to channel 0, this message alternates with the XM™ Radio eight digit radio ID label. This label is needed to activate the service. Radio ID not known If this message is received when tuned to channel 0, there (should only be if could be a receiver fault. Consult with your dealer/retailer. hardware failure) Hardware failure If this message does not clear within a short period of time, the receiver could have a fault. Consult with your dealer/retailer. XM™ Not Available If this message does not clear within a short period of time, the receiver could have a fault. Consult with your dealer/retailer. 336