Circuit/System Verification
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Make sure the vehicle is outside in an area with an unobstructed view of the southern sky. Turn on XM radio. Tune the radio to satellite channel 1. If the reception is not clear, Contact XM at 1-800-852-9696 to verify customer account status or possible network problems.