GM Service Manual Online
For 1990-2009 cars only

AM-FM Radio


Object Number: 808609  Size: B2

Radio with CD (MP3)


Object Number: 1434153  Size: B3

Radio with Six-Disc CD


Object Number: 1411837  Size: B3

Radio Data System (RDS)

The vehicle's audio system may have 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 can 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 display instead of the frequency. RDS stations can also provide the time of day, a program type (PTY) for current programming, and the name of the program being broadcast.

Playing the Radio

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

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

RCL (Recall) (AM-FM Radio): Press this knob to switch the display between the radio station frequency, band, and the time. When the ignition is off, press this knob to display the time.

DISPL (Display) or INFO (Information): When the ignition is off, press this knob to display the time. For RDS, press the INFO/DISPL knob to change what displays while using RDS. The display options are station name, RDS station frequency, PTY (program type), and the name of the program (if available). To change the default on the display, press the INFO/DISPL knob until you see the desired display, then hold the knob until a beep sounds. The selected display becomes 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 by increasing the volume as vehicle speed increases. Set the volume at the desired level. Depending on the radio, press one of these buttons to select MIN/LOW, MED, or MAX/HIGH AVOL. AUTO VOL displays. Each higher setting allows for more volume compensation at faster vehicle speeds. Then while driving, automatic volume increases the volume, as necessary, to overcome noise at any speed. The volume level should always sound the same. NONE may display if the radio cannot determine the vehicle speed. To turn automatic volume off, press this button until OFF or AUTO VOL OFF displays.

Finding a Station

AM FM (AM-FM Radio): Press this button to switch between FM1, FM2, or AM. The selection displays.

BAND: Press this button to switch between FM1, FM2, or AM. The display shows the selection.

TUNE or TUNE : Turn this knob to select radio stations.

SEEK (AM-FM Radio) : Press the SEEK arrows to go to the previous or to the next station and stay there. To scan stations, press and hold either SEEK arrow for two seconds until a beep sounds. The radio goes to a station, plays for a few seconds, then goes to the next station. Press either SEEK arrow again to stop scanning. To scan preset stations, press and hold either SEEK arrow for more than four seconds until two beeps sound. 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 SEEK arrow again to stop scanning presets. The radio only seeks and scans stations with a strong signal that are in the selected band.

or SEEK: Press the SEEK arrows or depending on the radio, the TYPE arrows to go to the previous or to the next station and stay there. The radio only seeks stations with a strong signal that are in the selected band.

or SCAN: Press and hold either SCAN arrow or either TYPE arrow for two seconds until SCAN or SCN 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 or either TYPE arrow again to stop scanning. To scan preset stations, press and hold either SCAN arrow or either TYPE arrow for more than four seconds. PSCN or PSC displays and a double beep sounds. The radio goes to a preset station, plays for a few seconds, then goes to the next preset station. Press either SCAN arrow or either TYPE 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 18 stations (six FM1, six FM2, and six AM), can be programmed on the six numbered pushbuttons, by performing the following steps:

  1. Turn the radio on.
  2. Press AM-FM on the AM-FM Radio or BAND to select FM1, FM2, or AM.
  3. Tune in the desired station.
  4. Press and hold one of the six numbered pushbuttons until a beep sounds. When that numbered pushbutton is pressed, the station that was set, returns for that pushbutton.
  5. Repeat the steps for each pushbutton.

The Radio with Six-Disc CD player is capable of storing an equalization setting to a preset station. Do the following steps for selecting an equalization setting:

  1. Tune to the preset station.
  2. Press and release the AUTO EQ button to select the equalization setting.
  3. Once the equalization no longer displays, the equalization is set for that preset station.

Setting the Tone (Bass/Midrange/Treble)

AUDIO: Push and release the AUDIO knob until BASS, and depending on some radios, MID (midrange), and TRE or TREB (treble) displays. Turn the knob to increase or to decrease the tone. The display shows the bass, midrange, or treble level. If a station is weak or has static, decrease the treble. To adjust the bass, and depending on some radios, midrange, and treble to the middle position, push and hold the AUDIO knob. The radio beeps once and adjusts the display level to the middle position. For the Am-FM Radio, adjust both tone controls and both speaker controls to the middle position by pressing another button to exit out of the audio mode, causing the radio to perform that function or wait five seconds for the display to return to time of day. Then press and hold AUDIO for more than two seconds until a beep sounds. CEN (center) displays. To adjust all tone and speaker controls to the middle position, push and hold the AUDIO knob when no tone or speaker controls display. ALL CENTERED displays and a beep sounds.

AUTO EQ (Automatic Equalization): Press this button to select customized equalization settings designed for country/western, 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: Push and release the AUDIO knob until BAL (balance) displays, to adjust the balance between the right and the left speakers. Turn the AUDIO knob, or depending on the radio, press and hold the arrows to move the sound toward the right or the left speakers. Push and release the AUDIO knob until FAD or FADE displays, to adjust the fade between the front and rear speakers. Turn the AUDIO knob, or depending on the radio, press and hold the arrows to move the sound toward the front or the rear speakers. For the AM-FM Radio, adjust balance or fade to the middle position by selecting BAL or FAD. Then press and hold AUDIO for more than two seconds until a beep sounds. B (balance) and a zero or an F (fade) and a zero displays. For the AM-FM Radio, adjust both tone controls and both speaker controls to the middle position by pressing another button to exit out of the audio mode, causing the radio to perform that function or wait five seconds for the display to return to time of day. Then press and hold AUDIO for more than two seconds until a beep sounds. CEN (center) displays. To adjust the balance or fade to the middle position, push and hold the AUDIO knob while BAL or FAD/FADE displays. The radio beeps once and adjusts the display level to the middle position. To adjust all tone and speaker controls to the middle position, push and hold the AUDIO knob while no tone or speaker controls display. ALL CENTERED displays and a beep sounds.

Fade might not be available if the vehicle is a regular cab model.

Finding a Program Type (PTY) Station (RDS) (Radio with CD)

To select and find a desired PTY perform the following:

  1. Turn the P-TYPE knob to activate program type select mode. TYPE and a PTY displays.
  2. Turn the P-TYPE knob again, to select a PTY.
  3. Once the desired PTY is displayed, press the SEEK TYPE button to select and to take you to the PTY's first station.
  4. To go to another station within that PTY, press the SEEK TYPE button twice to display the PTY and then go to another station.
  5. Press P-TYPE knob 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 PTY and TRAF are on, the radio searches for stations with the selected PTY and traffic announcements.

If the radio cannot find the desired program type, NONE displays and the radio returns to the last station you were listening to.

Finding a Program Type (PTY) Station (Radio with Six-Disc CD)

To select and find a desired PTY perform the following:

  1. Press the TYPE button to activate program type select mode. P-TYPE and the last selected PTY displays.
  2. Turn the TYPE knob or press and release the TYPE button to select a PTY.
  3. Once the desired PTY is displayed, press either the left or right TYPE arrow or the left or right SEEK arrow to select and to goes to the PTY's first station.
  4. To go to another station within that PTY while the PTY displays, press either the TYPE or the SEEK arrows once. If the PTY does not display, go back to Step 1.
  5. Press either the left or right TYPE arrow or the left or right SEEK arrow to exit program type select mode.
SCAN: Scan the stations within a PTY by performing the following:

  1. Press the TYPE button to activate program type select mode. P-TYPE and the last selected PTY displays.
  2. Turn the TYPE knob or press and release the TYPE button to select a PTY.
  3. Once the desired PTY is displayed, press and hold either the left or right TYPE arrow or the left or right SEEK arrow for two seconds, and the radio begins scanning the stations in the PTY.
  4. Press either the left or right TYPE arrow or the left or right SEEK arrow to stop scanning.
BAND (Alternate Frequency): Alternate frequency lets the radio 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.

Setting Preset PTYs (RDS Only) (Radio with Six-Disc CD)

These pushbuttons 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 TYPE button to activate program type select mode. P-TYPE and the last selected PTY displays.
  3. Turn the TYPE knob or press and release the TYPE button to select a PTY.
  4. Press and hold one of the six numbered pushbuttons until a beep sounds. When that numbered pushbutton is pressed, the PTY that was set returns.
  5. Repeat the steps for each pushbutton.

RDS Messages

ALERT!: The vehicle's audio system may have the Alert feature. 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 might display the artist, song title, call in phone numbers, etc. If the entire message is not displayed, parts of the message displays every three seconds. To scroll through the message, press and release the INFO button. A new group of words display after every press of this button. Once the complete message displays, INFO disappears from the display until another new message is received. The last message can be displayed by pressing the INFO button. The last message is shown until a new message is received or you tune to a different station. On some radios,NO INFO displays when a message is not available from a station.

TRAF (Traffic): The vehicle's audio system may have the Traffic feature. If TRAF displays, the tuned station broadcasts traffic announcements and when a traffic announcement broadcasts on the tuned radio station, you will hear it. If the 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 TRAF displays. If no station is found that broadcasts traffic announcements, NO TRAF displays. If TRAF is on the display, press the TRAF button to turn off the traffic announcements. 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.

Radio Messages

CAL, or 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 must be returned to your dealer/retailer for service.

LOC or LOCKED: This message is displayed when the THEFTLOCK® system has locked up. Take the vehicle to your dealer/retailer for service.

If any error occurs repeatedly, or if an error cannot be corrected, contact your dealer/retailer.

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 displays. As each new track starts to play, the track number displays.

The CD player can play the smaller 3 inch (8 cm) single CD with an adapter ring. Full-size CDs and the smaller CDs are loaded in the same manner.

1 FLD (Previous): This button is inactive when playing a CD.

2 FLD (Next): This button is inactive when playing a CD.

3 REV (Reverse): Press and hold this pushbutton to reverse quickly within a track. Press and hold this pushbutton for less than two seconds to reverse at 10 times the normal playing speed. Press and hold it for more than two seconds to reverse at 20 times the normal playing speed. Release this pushbutton to play the passage. ET and the elapsed time of the track displays.

4 FWD (Forward): Press and hold this pushbutton to advance quickly within a track. Press and hold this pushbutton for less than two seconds to advance at six times the normal playing speed. Press and hold it for more than two seconds to advance at 17 times the normal playing speed. Release this pushbutton to play the passage. ET and the elapsed time of the track displays.

6 RDM (Random): Press this pushbutton to hear the tracks in random, rather than sequential, order. RDM ON displays. RDM and the track number displays when each track starts to play. Press RDM again to turn off random play. RDM OFF displays.

SEEK : Press the left SEEK arrow to go to the start of the current or the previous track. Press the right SEEK arrow to go to the start of the next track. Pressing either SEEK arrow for more than two seconds scans the previous or next tracks, playing the first eight seconds of each track until track number one is reached. Release the button to stop scanning and to play the track.

TUNE : Turn this knob to fast track reverse or advance through tracks. The track number displays for each track.

DISPL (Display): Press this knob to see how long the current track has been playing. ET and the elapsed time of the track displays. To change the default on the display, track or elapsed time, press this knob until you see the desired display, then hold the knob for two seconds. The radio produces one beep and the selected display becomes the default.

BAND: Press this button to listen to the radio when a CD is playing. The inactive CD remains inside the radio for future listening.

CD AUX (Auxiliary): Press this button to play a CD when listening to the radio. The CD symbol displays when a CD is loaded.

(Eject): Press the button to eject a CD. Eject can be activated with either the ignition or radio off. CDs can be loaded with the ignition and radio off if this button is pressed first.

For vehicles that have a radio with a Six-Disc CD player, see the following:

LOAD: Press 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 indicator 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 indicator light, located to the right of the slot, begins to flash and MULTI LOAD # displays.

  4. Once the light stops flashing and turns green, INSERT CD # displays, 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 indicator light begins flashing again. Once the light stops flashing and turns green, you can load another CD. The CD player takes up to six CDs.

To load more than one CD but less than six, complete Steps 1 through 3. When finished loading CDs, press the LOAD button to cancel the loading function. 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 displays.

If an error displays, see "CD Messages" later in this section.

CD (Eject): Press this button to eject CD(s).

To eject the CD that is currently playing, press and release this button.

To eject multiple CDs, do the following:

  1. Press and hold the CD eject button for five seconds.
  2. A beep sounds and the indicator light, located to the right of the slot, begins to flash and EJECT ALL displays. Once the light stops flashing, REMOVE CD # displays.

  3. Remove the ejected CD. Once the CD is removed, the indicator light begins flashing again and another CD ejects.
  4. Press the LOAD or the eject button to stop ejecting CDs.

If the CD is not removed, after 25 seconds, the CD automatically pulls back into the player. If 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 button to eject a CD after you have tried 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.

REV (Reverse): Press and hold this button to reverse quickly within a track. A sound is heard at a reduced volume. Release this button to play the passage. The elapsed time of the track displays.

FWD (Forward): Press and hold this button to advance quickly within a track. A sound is heard at a reduced volume. Release this button to play the passage. The elapsed time of the track displays.

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

    • To repeat the track, press and release the RPT button. RPT displays. Press RPT again to turn off repeat play.
    • To repeat the CD, press and hold the RPT button for two seconds. RPT displays. Press RPT again to turn off repeat play.
RDM (Random): With the random setting, the tracks can be listened to 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 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 equalization setting while playing a CD. The equalization is stored whenever a CD is played. For more information on AUTO EQ, see "AUTO EQ" listed previously in this section.

SEEK : Press the left SEEK arrow to go to the start of the current track, if more than ten seconds have played. Press the right SEEK arrow to go to the next track. If either SEEK arrow is held or pressed more than once, the player continues moving backward or forward through the CD.

SCAN : To scan one CD, press and hold either SCAN arrow for more than two seconds until SCAN displays and a beep sounds. The radio goes to the next track, plays for 10 seconds, then goes to the next track. 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.

INFO (Information): Press this knob to see how long the current track has been playing. To change the default on the display, track or elapsed time, press the knob until you see the desired display, then hold the knob until the radio beeps. The selected display becomes the default.

BAND: Press this button to listen to the radio when a CD is playing. The inactive CD(s) remains inside the radio for future listening.

Care of Your CDs

If playing a CD-R, the sound quality can 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. Handle them carefully. Store CD-R(s) in their original cases or other protective cases and away from direct sunlight and dust. The CD player scans the bottom surface of the disc. If the surface of a CD is damaged, such as cracked, broken, or scratched, the CD does not play properly or not at all. Do not touch the bottom side of a CD while handling it; this could damage the surface. Pick up CDs by grasping the outer edges or the edge of the hole and the outer edge.

If the surface of a CD is soiled, take a soft, lint free cloth or dampen a clean, soft cloth in a mild, neutral detergent solution mixed with water, and clean it. Make sure the wiping process starts from the center to the edge.

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

Care of Your CD Player

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.

The use of CD lens cleaners for CDs is not advised, due to the risk of contaminating the lens of the CD optics with lubricants internal to the CD player mechanism.

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 displays, see "CD Messages" later in this section.

Using Song List Mode (Radio with Six-Disc CD)

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 display. If S-LIST displays, press the SONG LIST button to turn it off.
  3. Press the numbered pushbutton to select the desired CD, then use the SEEK arrows or the TYPE arrows 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 the track has been saved.
  5. Repeat Steps 3 and 4 for saving other selections.

S-LIST FULL displays if more than 20 selections are saved.

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

Seek through the song list by using the SEEK arrows or the TYPE arrow. Seeking past the last saved track returns 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 arrows or the TYPE 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.

Playing an MP3 CD-R Disc

Your vehicle's radio system might have the MP3 feature. If it has this feature, it is capable of playing an MP3 CD-R disc. For more information on how to play an MP3 CD-R disc, see Using an MP3 later in this section.

CD Messages

CHECK CD:  If this message displays 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 could have been a problem while burning the CD.
    • The label could 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/retailer. If the radio displays an error message, write it down and provide it to your dealer/retailer when reporting the problem.