Circuit System Verification
WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM™. Verify XM™ reception is clear and the No XM™ Signal message is not displayed on the radio.