Radio/Audio System Description and Operation: Notes

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

Battery positive voltage is provided to the radio from the RDO/INTLP/ONSTAR fuse in the fuse block- I/P. The radio is grounded to G302 and G303. The radio is enabled/disabled by class 2 messages from the body control module (BCM).

The Entertainment System on this vehicle is configured with a base and uplevel system. The base and uplevel systems contain a radio, antenna, speakers, and on some vehicle lines an audio amplifier.

The uplevel system differs from the base system by providing the customer with enhanced audio system features. Some of those features may include the radio data system (RDS), an audio amplifier and programmable equalizer (EQ). Satellite digital radio (U2K) is available with uplevel systems.

The following list shows the radios available for this vehicle:

Base Radio (UM7) - AM/FM Stereo
Base Radio (UM6) - AM/FM Stereo and Cassette
Base Radio (U1C) - AM/FM Stereo and CD
Uplevel Radio (UP0) - AM/FM Stereo, Cassette, CD, and RDS
Uplevel Radio (U1P) - AM/FM Stereo, CD, EQ and RDS
Uplevel Radio (U1Q) - AM/FM Stereo, Cassette, CD, EQ and RDS

Fig 1: Radio Features Table (1 Of 2)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Radio Features Table (2 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Cassette Features Table

Courtesy of GENERAL MOTORS CORP.

Fig 4: Compact Disc Features Table

Courtesy of GENERAL MOTORS CORP.

Each item in the list below represents topics covered in detail below:

AM/FM Reception
XM Reception
Antenna
Audio Amplifier
Theft Deterrent
Remote Playback Device
Radio Data System (RDS)
XM Satellite Radio
XM Advisory Messages
Radio Chime Level Adjustment
Tape/CD Player Error Messages