GM Service Manual Online
For 1990-2009 cars only

Object Number: 939255  Size: B2

If your vehicle has the Monsoon audio system, included are nine speakers and an eight channel amplifier. The radio displays MONSOON when the radio or the ignition is turned on. See your dealer for details.

Radio Data System (RDS)

The audio system has a Radio Data System (RDS). RDS features are available for use only on FM stations that broadcast RDS information.

With RDS, the 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 only works when the information is available. In rare cases, a radio station may broadcast incorrect information that causes the radio features to work improperly. If this happens, contact the radio station.

While the radio is tuned to an RDS station, the station name or call letters 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.

XM™ Satellite Radio Service

XM™ is a satellite radio service that is based in the 48 contiguous United States and Canada. XM™ offers a large variety of coast-to-coast channels including music, news, sports, talk, traffic/weather (U.S. subscribers), and children’s programming. XM™ provides digital quality audio and text information that includes song title and artist name. A service fee is required in order to receive the XM™ service. For more information, contact XM™; In the U.S. at www.xmradio.com or call 1-800-852-XMXM (9696) or in Canada at www.xmradio.ca or call 1-877-GET-XMSR (438-9677).

Playing the Radio

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

VOLUME: Turn this knob clockwise or counterclockwise to increase or to decrease the volume.

RCL (Recall): Press this knob to switch the display between the radio station frequency and the time. When the ignition is off, press this knob to display the time. For RDS, press the RCL knob to change what appears on the display while using RDS. The display options are station name, RDS station frequency, PTY, and the name of the program (if available). For XM™ (if equipped), press the RCL knob while in XM mode to retrieve four different categories of information related to the current song or channel: Artist, Song Title, Category or PTY, Channel Number/Channel Name. To change the default on the display, press the RCL knob until you see the desired display, then hold the knob until the display flashes. The selected display is now the default.

AUTO VOL (Automatic Volume): With automatic volume, the 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 (minimum) , MED (medium), or MAX (maximum). Each higher setting allows 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. To turn automatic volume off, press this button until OFF displays.

Finding a Station

BAND: Press this button to switch between FM1, FM2, AM, or XM1 or XM2 (if equipped). The display shows the 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 only seeks stations with a strong signal that are in the selected band.

[lang ]SCAN [rang ]: Press and hold either SCAN arrow for two seconds until SC displays and a beep sounds. The radio goes to a station, plays for a few seconds, then goes 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 appears on the display and a double beep sounds. The radio goes to the first preset station stored on the pushbuttons, plays for a few seconds, then goes to the next preset station. Press either SCAN arrow again to stop scanning presets. The radio only scans stations with a strong signal that are in the selected band.

Setting Preset Stations

Up to 30 stations (six FM1, six FM2, and six AM, six XM1 and six XM2 (if equipped)), can be programmed on the six numbered pushbuttons, by performing the following steps:

  1. Turn the radio on.
  2. Press BAND to select FM1, FM2, AM, or XM1 or XM2.
  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 a beep sounds. Whenever that numbered pushbutton is pressed, the station that was set returns and the equalization that was selected is stored for that pushbutton.
  6. Repeat the steps for each pushbutton.

Setting the Tone (Bass/Midrange/Treble)

AUDIO: Push the AUDIO knob until BASS, MID (midrange), or TREB (treble) displays. Turn the knob to increase or to decrease. If a station is weak or noisy, 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 display level adjusts to the middle position and a beep sounds. 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. CENTERED displays and one beep sounds.

AUTO EQ (Automatic Equalization): Press this button to select customized equalization settings designed for country, jazz, talk, pop, rock, and classical. To return to the manual mode, press the AUTO EQ button until CUSTOM displays. Then 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 (balance) displays. Turn the knob to move the sound toward the right or the left speakers. To adjust the fade between the front and rear speakers, push and hold the AUDIO knob until FAD (fade) displays. 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 display level adjusts to the middle position and a beep sounds. 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. CENTERED displays and one beep sounds.

Finding a Program Type (PTY) Station (RDS and XM™)

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 displays.
  2. Turn the P-TYPE knob to select a PTY.
  3. Once the desired PTY is displayed, press either SEEK arrow to select and to take you to the PTY's first station.
  4. 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 searches for stations with the selected PTY and traffic announcements.

To use the PTY interrupt feature, press and hold the P-TYPE button until a beep sounds on the PTY you want to interrupt with. When selected, an asterisk appears 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 interrupts play, if that selected program type format is broadcast.

SCAN: 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 displays.
  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 begins scanning the stations in the PTY.
  4. Press either SCAN arrow to stop at a station.

If both P-TYPE and TRAF are on, the radio scans 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 displays. The radio can switch to stations with a stronger frequency. To turn alternate frequency off, press and hold BAND again for two seconds. AF OFF displays. The radio does not switch to other stations. This function does not apply for XM™ Satellite Radio Service.

Setting Preset PTYs (RDS Only)

These buttons have factory PTY presets. Up to 12 PTYs (six FM1 and six FM2), can be programmed on the six numbered pushbuttons, 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 displays.
  3. Turn the P-TYPE knob to select a PTY.
  4. Press and hold one of the six numbered pushbuttons until a beep sounds. Whenever that numbered pushbutton is pressed, the PTY that was set returns.
  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! displays. You will hear the announcement, even if the volume is low or a CD is playing. If a CD is playing, play stops during the announcement. Alert announcements cannot be turned off. ALERT! is not 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 displays. Press this button to see the message. The message may display the artist, song title, call in phone numbers, etc. If the entire message is not displayed, parts of the message appears every three seconds. To scroll through the message, press and release the INFO button. A new group of words appear on the display after every press of this button. Once the complete message has displayed, INFO disappears from the display until another new message is received. The last message can be displayed by pressing the INFO button. You can view the last message until a new message is received or a different station is tuned to.

TRAF (Traffic): If TRAF displays, the tuned station broadcasts traffic announcements. To receive the traffic announcement from the tuned station, press this button. Brackets are displayed around TRAF and when a traffic announcement broadcasts 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 seeks to a station that does. When a station that broadcasts traffic announcements is found, the radio stops seeking and brackets are displayed around TRAF. If no station is found, NO TRAFFIC displays. If the brackets are on the display and TRAF is not, 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 that broadcasts traffic announcements, NO TRAFFIC displays. The radio plays the traffic announcement if the volume is low. The radio interrupts the play of a CD if the last tuned station broadcasts traffic announcements and the brackets are displayed. This function does not apply to XM™ Satellite Radio Service.

Radio Messages for XM™ Only

See XM Radio Messages later in this section for further detail.

Radio Messages

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

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

Playing a CD

If the ignition or radio is turned off, with a CD in the player, it stays in the player. When the ignition or radio is turned on, the CD starts playing where it stopped, if it was the last selected audio source.

When a CD is inserted, the CD symbol appears on the CD. As each new track starts to play, the track number appears on the display.

The CD player can play the smaller 3 inch (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. There may be an increase in skipping, difficulty in finding tracks, and/or difficulty in loading and ejecting. If these problems occur, check the bottom surface of the CD. If the surface of the CD is damaged, such as cracked, broken, or scratched, the CD will not play properly. If the surface of the CD is soiled, see Care of Your CDs for more information.

If there is no apparent damage, try a known good CD.

Do not add any label to a CD, it could get caught in the CD player. If a CD is recorded on a personal computer and a description label is needed, try labeling the top of the recorded CD with a marking pen.

Notice: If a label is added to a CD, or more than one CD is inserted into the slot at a time, or an attempt is made to play scratched or damaged CDs, the CD player could be damaged. While using the CD player, use only CDs in good condition without any label, load one CD at a time, and keep the CD player and the loading slot free of foreign materials, liquids, and debris.

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 holds up to six CDs.

To insert one CD, do the following:

  1. Turn the ignition on.
  2. Press and release the LOAD 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 pulls the CD in.

To insert multiple CDs, do the following:

  1. Turn the ignition on.
  2. Press and hold the LOAD button for two seconds.
  3. A beep sounds and the light, located to the right of the slot, begins 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 pulls the CD in.
  5. Once the CD is loaded, the light begins flashing again. Press the LOAD button again. Once the light turns green, load the next disc. Repeat this procedure for each CD. 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 finished loading CDs, the radio begins to play the last CD loaded.

If more than one CD has been loaded, a number for each CD displays.

Playing a Specific Loaded CD

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

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(s). A beep sounds and the indicator light flashes to let you know when a CD is being ejected. REMOVE CD displays. The CD can be removed. If the CD is not removed, after 25 seconds, the CD is automatically pulled back into the player. If the CD is pushed back into the player, before the 25 second time period is complete, the player senses an error and tries to eject the CD several times before stopping. Do not repeatedly press the CD eject button to eject a CD after trying to push it in manually. The player's 25-second eject timer resets at each press of eject, causing the player 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 clears the CD-sensing feature and enables 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 this button to play the passage. The elapsed time of the track appears on the display.

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

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

    • To repeat the track you are listening to, press and release the RPT button. RPT displays. 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 displays. 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 displays. 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. A beep sounds and RANDOM ALL displays. 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 is set whenever a CD is played. 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 played. Press the right arrow to go to the next track. If either arrow is held or pressed more than once, the player continues 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 displays and a beep sounds. 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 displays and a beep sounds. Use this feature to listen to 10 seconds of the first track of each loaded CD. 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 desired display, then hold the knob until the display flashes. The selected display is now the default.

BAND: Press this button to play the radio when a CD is playing. The inactive CD(s) remains 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-disc 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 to locate the track to be saved. The track begins to play.
  4. Press and hold the SONG LIST button to save the track into memory. When SONG LIST is pressed, one beep sounds. After two seconds of continuously pressing the SONG LIST button, two beeps sound to confirm that the track has been saved.
  5. Repeat Steps 3 and 4 for saving other selections.

S-LIST FULL displays if you try to save more than 20 selections.

To play the song list, press the SONG LIST button. One beep sounds and S-LIST displays. The recorded tracks begins to play in the order they were saved.

Seek through the song list by using the SEEK SCAN arrows. Seeking past the last saved track returns the song list 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 displays.
  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, one beep sounds. After two seconds of continuously pressing the SONG LIST button, two beeps sound 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 is 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 displays.
  3. Press and hold the SONG LIST button for more than four seconds. One beep sounds, followed by two beeps after two seconds, and a final beep sounds after four seconds. S-LIST EMPTY displays indicating 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 sounds and S-LIST is removed from the display.

CD Messages

CHECK CD:  If this message appears on the display and/or the CD comes out, 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 the radio displays an error message, write it down and provide it to your dealer when reporting the problem.