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Radio/Audio System Description and Operation: Notes

WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Battery positive voltage is provided to the radio from RADIO AMP fuse in the fuse block - right instrument panel (I/P). The radio is grounded to G201. The radio is enabled/disabled by class 2 messages from the body control module (BCM). The BCM also allows for retained accessory power which allows the radio to operate for up to 10 minutes after the ignition is turned off. The radio can only be deactivated by one of the following conditions:

  1. Front door is opened.
  2. The 10 minute timer has elapsed.
  3. Loss of state of health message from the BCM.

The entertainment system on this vehicle is configured with a base or uplevel system.

Both systems include a radio, antenna, and speakers.

The uplevel system provides the customer with enhanced audio system features. Digital radio reception is available as an option with all radio levels. The following list shows the Entertainment RPOs that are available for this vehicle:

Radio Features

Controls Base US8 Uplevel US9
Power Push PWR/VOL knob to turn radio on or off.
Volume The volume is adjusted by rotating the PWR/VOL knob.
Speed Compensated Volume (SCV) Press the AUTO VOL button to select LOW, MED, HIGH, or OFF.
Tune Rotate the tune knob.
Seek Momentarily press the SEEK/SCAN button.
Scan Press the SEEK/SCAN button for at least 3 seconds until a single beep is heard.
Presets Six AM, Six FM1, Six FM2
Six XM1, Six XM2 if equipped with U2K
Preset Saving Press and hold the desired numbered preset button until an audible beep is heard.
Preset Scan Press and hold the SEEK/SCAN button at least 6 seconds until 2 beeps are heard and Preset Scan is displayed on the radio.
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.
Mute Steering Wheel Control Only
Press the MUTE button to silence the audio system. Press it again to unmute.
Fade or Balance Press the AUDIO button until desired setting is displayed. Rotate the knob to adjust the setting.
Bass, Midrange, or Treble Press the AUDIO button until desired setting is displayed. Rotate the knob to adjust the setting.
Auto EQ Press the AUTO EQ button to choose pre-programmed equalizer settings.
CD/MP3 Features

Controls Base US8 Uplevel US9
Play/Stop Press the CD/AUX button.
Eject Current Disc Press the Eject button.
Eject All Disc - Press and hold the Eject button until a beep is heard.
Forward Press and hold the FWD button.
Reverse Press and hold the REV button.
Previous Track Press the left side of the SEEK/SCAN rocker button.
Next Track Press the right side of the SEEK/SCAN rocker button.
Disc Select - Press button 1-6 to select a disc.
Repeat Press the RPT button. User can select Repeat Song or Repeat Off. Press the RPT button. User can select Repeat Disc, Repeat Song or Repeat Off.
Random Press the RDM button. User can select Random On or Random Off. Press the RDM button. User can select Random Disc, Random All, or Random Off.
Folder Up Press right side of FWD/REV rocker button.
Folder Down Press left side of FWD/REV rocker button.
Song List Select desired track on CD or MP3 disc. Press Song List button to enter song list mode. Press and hold Song List button to add track to song list. Press and hold Song List button again to remove selected song from list. Press Song List button again to exit song list mode.

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