2003 Chevrolet Tahoe Owner's Manual - Page 244

XMTMRadio Messages (cont'd) Radio Display Message No Info Condition Action Required XM Locked Theft lock active The XM receiver in your vehicle may have previously been in another vehicle. For security purposes, XM receivers cannot be swapped between vehicles. If you receive this message after having your vehicle serviced, check with the servicing facility. If you tune to channel 0, you will see this message alternating with your XM Radio 8 digit radio ID label. This label is needed to activate your service. receive this messagewhenyou tune to channel 0, you may have a receiver fault. Consult with your dealer. Radio ID Radio ID label (channel 0) io ID not known you If Unknown eiver may have a fault. Consult with your retail 3-93