2003 GMC Sierra 1500 Pickup Owner's Manual - Page 246

XMTMRadio Messages (cont'd) the chosen category ~ ~~ ~~ selected. Your system is working properly. The XM receiver in your vehicle may have previously been in another vehicle. For security purposes, XM receivers cannot be swapped between vehicles. I you receive this f message after having your vehicle serviced, check with the servicing facility. ~ ~~ XM Locked Theft lock active Radio ID Radio ID label (channel 0) Radio ID not known (should only be if hardware failure) Hardware failure 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. If you receive this message when you tune to channel 0, you may have a receiver fault. Consult with your dealer. Unknown Chk XMRcvr If this message does not clear within a short period of time, your receiver may have a fault. Consult with your retail location. 3-91