Circuit/System Description
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
The digital radio receiver (DRR) receives an XM satellite radio signal via the cellular and digital radio antenna. This signal is passed to the DRR through the digital radio antenna coax. From the DRR, two left and right audio signals (+) and one audio common (-) are sent to the radio. The radio then processes these signals and passes the audio to the appropriate speakers or amplifier.