Circuit/System Description
WARNING: This page is about a different car, the 2009 Saturn Vue. 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, separate left and right audio signals (+ and -) are sent to the radio. The radio then processes these signals and passes the audio to the appropriate speakers or amplifier.