Circuit/System Verification
WARNING: This page is about a different car, the 2008 Cadillac CTS. 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.