2006 Buick Rendezvous Owner's Manual - Page 249

Radio Messages CAL ERR (Calibration Error): The audio system has been calibrated for your vehicle from the factory. If CAL ERR appears on the display it means that the radio has not been configured properly for the vehicle and it must be returned to the dealer for service. Radio Display Message XL (Explicit Language Channels) Condition XL on the radio display, after the channel name, indicates content with explicit language. Updating encryption code Loss of signal LOCKED: This message is displayed when the THEFTLOCK® system has locked up. Take your vehicle to the dealer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your dealer. XM™ Radio Messages Action Required These channels, or any others, can be blocked at a customer's request, by calling 1-800-852-XMXM (9696). Updating No Signal Loading XM Acquiring channel audio (after 4 second delay) Channel not in service Channel no longer available CH Off Air CH Unavail The encryption code in the receiver is being updated, and no action is required. This process should take no longer than 30 seconds. The system is functioning correctly, but the vehicle is in a location that is blocking the XM signal. When the vehicle is moved into an open area, the signal should return. The audio system is acquiring and processing audio and text data. No action is needed. This message should disappear shortly. This channel is not currently in service. Tune to another channel. This previously assigned channel is no longer assigned. Tune to another station. If this station was one of the presets, choose another station for that preset button. 3-107