GM Service Manual Online
For 1990-2009 cars only

Object Number: 939255  Size: B2

Playing the Radio

PWR (Power): Push this knob to turn the system on and off.

VOLUME: Turn this knob to increase or to decrease volume.

AUTO VOL (Automatic Volume): Your system has a feature called automatic volume. With this feature, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Press this button to select MIN, MED, or MAX. Each higher setting will allow for more volume compensation at faster vehicle speeds. Then, as you drive, automatic volume increases the volume, as necessary, to overcome noise at any speed. The volume level should always sound the same to you as you drive. If you do not want to use automatic volume, select OFF.

RCL (Recall): Press this knob to switch the display between the radio station frequency and the time. Pressing this knob with the ignition off will display the time. To change the default on the display, press the RCL knob until you see the display you want, then hold the knob until the display flashes. The selected display will now be the default.

Finding a Station

BAND: Press this button to switch between FM1, FM2, or AM. The display will show your selection.

TUNE: Turn this knob to select radio stations.

[lang ]SEEK [rang ]: Press the right or the left arrow to go to the next or to the previous station and stay there. The radio will seek only to stations that are in the selected band and only to those with a strong signal.

[lang ]SCAN [rang ]: Press and hold either SCAN arrow for two seconds until SC appears on the display and you hear a beep. The radio will go to a station, play for a few seconds, then go on to the next station. Press either SCAN arrow again to stop scanning. To scan preset stations, press and hold either SCAN arrow for more than four seconds. PRESET SCAN will appear on the display. You will hear a double beep. The radio will go to the first preset station stored on your pushbuttons, play for a few seconds, then go on to the next preset station. Press either SCAN arrow again to stop scanning presets. The radio will scan only to stations that are in the selected band and only to those with a strong signal.

Setting Preset Stations

The six numbered pushbuttons let you return to your favorite stations. You can set up to 30 stations (six FM1, six FM2, and six AM), by performing the following steps:

  1. Turn the radio on.
  2. Press BAND to select FM1, FM2, or AM.
  3. Tune in the desired station.
  4. Press AUTO EQ to select the equalization.
  5. Press and hold one of the six numbered pushbuttons until you hear a beep. Whenever you press that numbered pushbutton, the station you set will return and the equalization that you selected will be automatically stored for that pushbutton.
  6. Repeat the steps for each pushbutton.

Setting the Tone (Bass/Treble)

AUDIO: Push the AUDIO knob until BASS, MID, or TREB appears on the display. Turn the knob to increase or to decrease. If a station is weak or noisy, you may want to decrease the treble. To adjust bass, midrange, or treble to the middle position, select BASS, MID, or TREB and push and hold the AUDIO knob. The radio will produce one beep and adjust the display level to zero. To adjust all tone and speaker controls to the middle position, push and hold the AUDIO knob when no tone or speaker control is displayed. The radio will produce one beep and CENTERED will appear on the display.

AUTO EQ (Automatic Equalization): Press this button to select customized bass, midrange, and treble equalization settings designed for country, jazz, talk, pop, rock, and classical. To return to the manual mode (CUSTOM), press the AUTO EQ button until CUSTOM appears on the display. Then you will be able to manually adjust the bass, midrange, and treble using the AUDIO knob.

Adjusting the Speakers (Balance/Fade)

AUDIO: To adjust the balance between the right and the left speakers, push the AUDIO knob until BAL appears on the display. Turn the knob to move the sound toward the right or the left speakers. To adjust the fade between the front and the rear speakers, push and hold the AUDIO knob until FAD appears on the display. Turn the knob to move the sound toward the front or the rear speakers. To adjust the balance and the fade to the middle position, select balance or fade and push and hold the AUDIO knob. The radio will beep once and will adjust the display level to the middle position. To adjust all tone and speaker controls to the middle position, push and hold the AUDIO knob when no tone or speaker controls are displayed. The radio will produce one beep and CENTERED will appear on the display.

Radio Data System (RDS)

Your audio system is equipped with a Radio Data System (RDS). RDS features are available for use only on FM stations that broadcast RDS information.

With RDS, your radio can do the following:

    • Seek to stations broadcasting the selected type of programming
    • Receive announcements concerning local and national emergencies
    • Display messages from radio stations
    • Seek to stations with traffic announcements.

This system relies upon receiving specific information from these stations and will only work when the information is available. In rare cases, a radio station may broadcast incorrect information that will cause the radio features to work improperly. If this happens, contact the radio station.

While you are tuned to an RDS station, the station name or the call letters will appear on the display instead of the frequency. RDS stations may also provide the time of day, a program type (PTY) for current programming, and the name of the program being broadcast.

Finding a Program Type (PTY) Station

To select and find a desired PTY perform the following:

  1. Press the P-TYPE button to activate program type select mode. P-TYPE and the last selected PTY will appear on the display.
  2. Turn the P-TYPE knob to select a PTY.
  3. Once the desired PTY is displayed, press either SEEK arrow to select the PTY and take you to the PTY's first station.
  4. If you want to go to another station within that PTY and the PTY is displayed, press either SEEK arrow once. If the PTY is not displayed, press either SEEK arrow twice to display the PTY and then to go to another station.
  5. Press P-TYPE to exit program type select mode.
  6. If PTY times out and is no longer on the display, go back to Step 1.

If both P-TYPE and TRAF are on, the radio will search for stations with the selected PTY and traffic announcements.

To use the PTY interrupt feature, press and hold the P-TYPE button until you hear a beep on the PTY you want to interrupt with. When selected, an asterisk will appear beside that PTY on the display. You may select multiple interrupts if desired. When you are listening to a CD, the last selected RDS station will interrupt play if that selected program type format is broadcast.

SCAN: You can scan the stations within a PTY by performing the following:

  1. Press the P-TYPE button to activate program type select mode. P-TYPE and the last selected PTY will appear on the display.
  2. Turn the P-TYPE knob to select a PTY.
  3. Once the desired PTY is displayed, press and hold either SCAN arrow, and the radio will begin scanning the stations in the PTY.
  4. Press either SCAN arrow to stop at a station.

If both PTY and TRAF are on, the radio will scan for stations with the selected PTY and traffic announcements.

BAND (Alternate Frequency): Alternate frequency allows the radio to switch to a stronger station with the same program type. To turn alternate frequency on press and hold BAND for two seconds AF ON will appear on the display. The radio may switch to stronger stations. To turn alternate frequency off press and hold BAND again for two seconds. AF OFF will appear on the display. The radio will not switch to other stations. When you turn the ignition off and then on again, the alternate frequency feature will automatically be turned on.

Setting Preset PTYs (RDS Only)

The six numbered pushbuttons let you return to your favorite PTYs. These buttons have factory PTY presets. You can set up to 12 PTYs (six FM1 and six FM2) by performing the following steps:

  1. Press BAND to select FM1 or FM2.
  2. Press the P-TYPE button to activate program type select mode. P-TYPE and the last selected PTY will appear on the display.
  3. Turn the P-TYPE knob to select a PTY.
  4. Press and hold one of the six numbered pushbuttons until you hear a beep. Whenever you press that numbered pushbutton, the PTY you set will return.
  5. Repeat the steps for each pushbutton.

RDS Messages

ALERT!: Alert warns of local or national emergencies. When an alert announcement comes on the current radio station, ALERT! will appear on the display. You will hear the announcement, even if the volume is muted or a CD is playing. If a CD is playing, play will stop during the announcement. You will not be able to turn off alert announcements. ALERT! will not be affected by tests of the emergency broadcast system. This feature is not supported by all RDS stations.

INFO (Information): If the current station has a message, INFO will appear on the display. Press this button to see the message. The message may display the artist, song title, call in phone numbers, etc. If the whole message is not displayed, parts of the message will appear every three seconds. To scroll through the message at your own speed, press the INFO button repeatedly. A new group of words will appear on the display with each press. Once the complete message has been displayed, INFO will disappear from the display until another new message is received. The old message can be displayed by pressing the INFO button. You can view an old message until a new message is received or a different station is tuned to.

TRAF (Traffic): If TRAF appears on the display, the tuned station broadcasts traffic announcements. To receive the traffic announcement from the tuned station, press this button. Brackets will be displayed around TRAF and when a traffic announcement comes on the tuned radio station you will hear it. If the current tuned station does not broadcast traffic announcements, press the TRAF button and the radio will seek to a station that does. When the radio finds a station that broadcasts traffic announcements, the radio will stop and brackets will be displayed around TRAF. When a traffic announcement comes on the tuned radio station you will hear it. If no station is found, NO TRAFFIC will appear on the display. If the brackets are on the display and TRAF is not, you can then press the TRAF button to remove the brackets or use the TUNE knob or the SEEK arrows to go to a station that supports traffic announcements. If no station is found, NO TRAFFIC will appear on the display. Your radio will play the traffic announcements if the volume is low. Your radio will interrupt the play of a CD if the last tuned station broadcasts traffic announcements and the brackets are displayed.

Radio Messages

CAL ERR (Calibration Error): Your audio system has been calibrated for your vehicle from the factory. If CAL ERR appears on the display it means that your radio has not been configured properly for your vehicle and it must be returned to the dealer for service.

LOCKED: This message is displayed when the THEFTLOCK® system has locked up. You must return to the dealer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your dealer.

Playing a CD

The CD player can play the smaller 8 cm single CDs with an adapter ring. Full-size CDs and the smaller CDs are loaded in the same manner.

If playing a CD-R the sound quality may be reduced due to CD-R quality, the method of recording, the quality of the music that has been recorded, and the way the CD-R has been handled. You may experience an increase in skipping, difficulty in finding tracks, and/or difficulty in loading and ejecting. If these problems occur try a known good CD.

Do not add paper labels to CDs, they could get caught in the CD player.

Do not play 3 inch CDs without a standard adapter CD.

If an error appears on the display, see "CD Messages" later in this section.

LOAD CD : Press the LOAD side of this button to load CDs into the CD player. This CD player will hold up to six CDs.

To insert one CD, do the following:

  1. Turn the ignition on.
  2. Press and release the LOAD side of the LOAD CD button.
  3. Wait for the light, located to the right of the slot, to turn green.
  4. Load a CD. Insert the CD partway into the slot, label side up. The player will pull the CD in.

When a CD is inserted, the CD symbol will be displayed. If you select an equalization setting for your CD, it will be activated each time you play a CD.

The CD will begin to play automatically. As each new track starts to play, the track number will appear on the display.

To insert multiple CDs, do the following:

  1. Turn the ignition on.
  2. Press and hold the LOAD side of the LOAD CD button for two seconds.
  3. You will hear a beep and the light, located to the right of the slot, will begin to flash.

  4. Once the light stops flashing and turns green, load a CD. Insert the CD partway into the slot, label side up. The player will pull the CD in.
  5. Once the CD is loaded, the light will begin flashing again. Press the LOAD side of the LOAD CD button again. Once the light turns green, load the next CD. Repeat this procedure for each CD.
  6. The CD player takes up to six CDs. Do not try to load more than six.

To load more than one CD but less than six, complete Steps 1 through 3. When you have finished loading CDs, the radio will begin to play the last CD loaded.

When a CD is inserted, the CD symbol will be displayed. If more than one CD has been loaded, a number for each CD will be displayed. If you select an equalization setting for your CD, it will be activated each time you play a CD.

As each new track starts to play, the track number will appear on the display.

Playing a Specific Loaded CD

For every CD loaded, a number will appear on the display. To play a specific CD, first press the CD AUX button, then press the numbered pushbutton that corresponds to the CD you want to play. A small bar will appear under the CD number that is playing, and the track number will appear.

If an error appears on the display, see "CD Messages" later in this section.

LOAD CD (Eject): Press the CD eject side of this button to eject a CD. You will hear a beep and the light will flash to let you know when a CD is being ejected. REMOVE CD will be displayed. You can now remove the CD. If the CD is not removed, after 25 seconds, the CD will be automatically pulled back into the receiver. If you try to push the CD back into the receiver, before the 25 second time period is complete, the receiver will sense an error and will try to eject the CD several times before stopping. Do not repeatedly press the CD eject button to eject a CD after you have tried to push it in manually. The receivers 25-second eject timer will reset at each press of eject, which will cause the receiver to not eject the CD until the 25-second time period has elapsed. Once the player stops and the CD is ejected, remove the CD. After removing the CD, push the PWR knob off and then on again, or wait for the system to reset. This will clear the CD-sensing feature and enable CDs to be loaded into the player again.

REV (Reverse): Press and hold this button to reverse quickly within a track. You will hear sound at a reduced volume. Release the button to play the passage. The display will show the elapsed time of the track.

FWD (Forward): Press and hold this button to advance quickly within a track. You will hear sound at a reduced volume. Release the button to play the passage. The display will show the elapsed time of the track.

RPT (Repeat): With repeat, you can repeat one track or an entire CD. To use repeat, do the following:

    • To repeat the track you are listening to, press and release the RPT button. RPT will appear on the display. Press RPT again to turn off repeat play.
    • To repeat the CD you are listening to, press and hold the RPT button for two seconds. RPT will appear on the display. Press RPT again to turn off repeat play.
RDM (Random): With random, you can listen to the tracks in random, rather than sequential, order, on one CD or on all of the CDs. To use random, do one of the following:

    • To play the tracks on the CD you are listening to in random order, press and release the RDM button. RANDOM ONE will appear on the display. Press RDM again to turn off random play.
    • To play the tracks on all of the CDs that are loaded in random order, press and hold RDM for more than two seconds. You will hear a beep and RANDOM ALL will appear on the display. Press RDM again to turn off random play.
AUTO EQ (Automatic Equalization): Press AUTO EQ to select the desired equalization setting while playing a CD. The equalization will be automatically set whenever you play a CD. For more information on AUTO EQ, see "AUTO EQ" listed previously in this section.

[lang ]SEEK [rang ]: Press the left arrow to go to the start of the current track, if more than ten seconds have passed. Press the right arrow to go to the next track. If you hold an arrow or press it more than once, the player will continue moving backward or forward through the CD.

[lang ]SCAN [rang ]: To scan one CD, press and hold either SCAN arrow for more than two seconds until SCAN appears on the display and you hear a beep. Use this feature to listen to 10 seconds of each track of the currently selected CD. Press either SCAN arrow again, to stop scanning. To scan all loaded CDs, press and hold either SCAN arrow for more than four seconds until CD SCAN appears on the display and you hear a beep. Use this feature to listen to 10 seconds of the first tracks of each CD loaded. Press either SCAN arrow again, to stop scanning.

RCL (Recall): Press this knob to see how long the current track has been playing. To change the default on the display (track and elapsed time), press the knob until you see the display you want, then hold the knob until the display flashes. The selected display will now be the default.

BAND: Press this button to play the radio when a CD(s) is playing. The inactive CD will remain safely inside the radio for future listening.

CD AUX (Auxiliary): Press this button to play a CD when listening to the radio.

Using Song List Mode

The six-CD CD changer has a feature called song list. This feature is capable of saving 20 track selections.

To save tracks into the song list feature, perform the following steps:

  1. Turn the CD player on and load it with at least one CD. See "LOAD CD" listed previously in this section for more information.
  2. Check to see that the CD changer is not in song list mode. S-LIST should not appear in the display. If S-LIST is present, press the SONG LIST button to turn it off.
  3. Select the desired CD by pressing the numbered pushbutton and then use the SEEK SCAN right arrow button to locate the track that you want to save. The track will begin to play.
  4. Press and hold the SONG LIST button to save the track into memory. When SONG LIST is pressed a beep will be heard immediately. After two seconds of continuously pressing SONG LIST, two beeps will sound to confirm that the track has been saved.
  5. Repeat Steps 3 and 4 for saving other selections.

S-LIST FULL will appear on the display if you try to save more than 20 selections.

To play the song list, press the SONG LIST button. One beep will be heard and S-LIST will appear on the display. The recorded tracks will begin to play in the order that they were saved.

You may seek through the song list by using the SEEK SCAN arrows. Seeking past the last saved track will return you to the first saved track.

To delete tracks from the song list, perform the following steps:

  1. Turn the CD player on.
  2. Press the SONG LIST button to turn song list on. S-LIST will appear on the display.
  3. Press the SEEK SCAN arrows to select the desired track to be deleted.
  4. Press and hold the SONG LIST button for two seconds. When SONG LIST is pressed, a beep will be heard immediately. After two seconds of continuously pressing the SONG LIST button, two beeps will be heard to confirm that the track has been deleted.

After a track has been deleted, the remaining tracks are moved up the list. When another track is added to the song list, the track will be added to the end of the list.

To delete the entire song list, perform the following steps:

  1. Turn the CD player on.
  2. Press the SONG LIST button to turn song list on. S-LIST will appear on the display.
  3. Press and hold the SONG LIST button for more than four seconds. A beep will be heard, followed by two beeps after two seconds and a final beep will be heard after four seconds. S-LIST EMPTY will appear on the display indicating that the song list has been deleted.

If a CD is ejected, and the song list contains saved tracks from that CD, those tracks are automatically deleted from the song list. Any tracks saved to the song list again are added to the bottom of the list.

To end song list mode, press the SONG LIST button. One beep will be heard and S-LIST will be removed from the display.

CD Messages

CHECK CD:  If this message appears on the radio display, it could be for one of the following reasons:

    • It is very hot. When the temperature returns to normal, the CD should play.
    • You are driving on a very rough road. When the road becomes smoother, the CD should play.
    • The CD is dirty, scratched, wet, or upside down.
    • The air is very humid. If so, wait about an hour and try again.
    • There may have been a problem while burning the CD.
    • The label may be caught in the CD player.

If the CD is not playing correctly, for any other reason, try a known good CD.

If any error occurs repeatedly or if an error cannot be corrected, contact your dealer. If your radio displays an error message, write it down and provide it to your dealer when reporting the problem.