Personal Audio Link (PAL)
WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The Personal Audio Link (PAL) module is a dealer installed accessory that allows the radio to control an Apple iPod with the latest software installed. The installation kit included with the PAL module includes a T-harness that connects inline behind the radio. The radio sees the PAL module as another Digital Radio Receiver (DRR), or XM radio. The audio circuits are shared between the DRR (if equipped), and the PAL. The power and ground circuits are shared with the radio and the PAL. By pressing the BAND button on the radio, the radio will cycle through AM, FM, and XM. The XM band alternates between XM and the PAL. The CAT button will allow access to the PAL menu screens. While the iPod is connected, the PAL module will charge it.