Radio/Audio System Description and Operation: Notes

WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The radio receives power from the RADIO fuse in the junction block-right I/P. Ground is provided via G201 and G202. The radio is enabled/disabled by class 2 messages from the body control module (BCM). The radio routes audio signals from the digital radio receiver or the vehicle communication interface module (VCIM) to the speakers and/or amplifier when directed by class 2 messages.

The Entertainment System on this vehicle is configured with an AM/FM stereo radio with the radio data system (RDS) and either a cassette player or a CD player or both. CD and cassette. The uplevel system provides the customer with extended range speakers and an audio amplifier. Satellite digital radio (U2K) is available with uplevel systems.

The following list shows the radios available for this vehicle:

Radio (ULO) - AM/FM Stereo, Cassette with RDS
Radio (UNO) - AM/FM Stereo, CD and RDS
Radio (UPO) - AM/FM Stereo, Cassette with CD and RDS

Radio Features

Controls	All Radios
Power	Push the PWR/VOL knob to turn the radio on.
Volume	The volume is adjusted by rotating the PWR/VOL knob.
Speed Compensated Volume (SCV)	Press the AUTO VOL button. The available settings are OFF, LOW, MEDIUM, and HIGH.
Tune	Turn the TUNE/DISP knob.
Seek	Momentarily press the SEEK/SCAN button.
Scan	Hold the SEEK/SCAN button at least 2 seconds.
Presets	Six AM, Six FM1 and Six FM2. Six XM1 and Six XM2 if equipped with U2K.
Preset Saving	Press and hold desired button until an audible beep is heard.
Preset Seek	Steering Wheel Control only
Preset Scan	Hold the SEEK/SCAN button at least 4 seconds.
Set Clock	Press and hold the HR or MN button until an audible beep indicates the time set mode has been entered. Once the beep is heard, the time can be set by tapping each button to incrementally adjust the time. Holding down each button will rapidly change the time.
Recall	Push the TUNE/DISP knob.
Mute	Steering Wheel Control only
Fade or Balance	Push and release the AUDIO knob until fade or balance appears in the display and adjust by rotating the AUDIO knob.
Bass, Treble or Midrange	Push and release the AUDIO knob until bass, mid, or treb appears in the display and adjust by rotating the AUDIO knob.
Programmable Equalizer	Press the AUTO TONE button to cycle through the preset equalization settings.

Cassette Features

Controls	ULO	UPO
Play/Stop	Press the TAPE/AUX button.	Press the CD/TAPE button.
Eject	Press the EJECT button.
Forward	Press the preset button 4.
Reverse	Press the preset button 3.
Auto Reverse	Yes
Previous	Press the left arrow on SEEK/SCAN button, or press the preset button 1.
Next	Press the right arrow on SEEK/SCAN button, or press the preset button 2.
Side	Press the preset button 5.

Compact Disc Features

Controls	UNO	UPO
Play/Stop	Press the CD/AUX button.	Press the CD/TAPE button.
Eject	Press the EJECT button.
Forward	Press the preset button 4.
Reverse	Press the preset button 3.
Previous	Press the left arrow on SEEK/SCAN button, or press the preset button 1.
Next	Press the right arrow on SEEK/SCAN button, or press the preset button 2.
Repeat	N/A	Press the RPT button.
Random	Press the RDM button, or preset button 6.

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

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