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Radio/Audio Block Diagram

WARNING: This page is about a different car, the 2015 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Radio/Audio Block Diagram
GM3666064Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
UF7 RADIO: AM/FM STEREO, SEEK/SCAN, ETR, CLOCK DSP, MP3/WMA, USB, AUX/IN, WIRELESS INTERFACE
UH7 RADIO: AM/FM STEREO, SEEK/SCAN, CD, ETR, CLOCK DSP, MP3/WMA, USB, AUX/IN, WIRELESS INTERFACE
UE1 COMMUNICATION SYSTEM: VEHICLE, ONSTAR
UF7 RADIO: AM/FM STEREO, SEEK/SCAN, ETR, CLOCK DSP, MP3/WMA, USB, AUX/IN, WIRELESS INTERFACE
UH7 RADIO: AM/FM STEREO, SEEK/SCAN, CD, ETR, CLOCK DSP, MP3/WMA, USB, AUX/IN, WIRELESS INTERFACE
B24 B24 Cellular Phone Microphone
T4G T4G Cellular Phone, Navigation and Digital Radio Antenna
T4M T4M Radio Antenna
A11 A11 Radio
K73 K73 Telematics Communication Interface Control Module
X83 X83 Auxiliary Audio Input
X84 X84 Data Link Connector