2010 GMC Canyon Extended Cab Owner's Manual - Page 213

Radio ID: If this message is received when tuned to channel 0, there could be a receiver fault. Consult with your dealer/retailer. Unknown: If this message is received when tuned to channel 0, there could be a receiver fault. Consult with your dealer/retailer. Check XM: If this message does not clear within a short period of time, the receiver could have a fault. Consult with your dealer/retailer. RDS Radios THEFTLOCK® is designed to discourage theft of your vehicle's radio. The feature works automatically by learning a portion of the Vehicle Identification Number (VIN). If the radio is moved to a different vehicle, it does not operate and LOCKED displays. When the radio and vehicle are turned off, the blinking red light indicates that THEFTLOCK® is armed. With THEFTLOCK® activated, the radio does not operate if stolen. Theft-Deterrent Feature Non-RDS Radios THEFTLOCK® is designed to discourage theft of your vehicle's radio. The feature works automatically by learning a portion of the Vehicle Identification Number (VIN). If the radio is moved to a different vehicle, it does not operate and LOC displays. With THEFTLOCK® activated, the radio does not operate if stolen. Radio Reception Frequency interference and static can occur during normal radio reception if items such as cell phone chargers, vehicle convenience accessories, and external electronic devices are plugged into the accessory power outlet. If there is interference or static, unplug the item from the accessory power outlet. 4-61