2003 Chevrolet Tahoe Owner's Manual - Page 243

XMTMRadio Messages Radio Display Message ~~~~~ ~ ~ ~ Condition Action Required These channels, or any others, can be blocked at a customer's request, by calling 1-800-852-XMXM (9696). XL (Explicit Language Channels) XL on the radio display, after the channel name, indicates content with explicit language. Updating encryption code Loss of signal Updating The encryption code in your receiver is being updated, and no action is required. This process should take no longer than 30 seconds. Your system is functioning correctly, but you are in a location that is blocking the XM signal. When you move into an open area, the signal should return. Your radio system is acquiring and processing audio and text data. No action is needed. This message should disappear shortly. No Signal Loading XM Acquiring channel audio (after 4 second delay) CH Off Air CH Unavail No info No Info 3-92