GM Service Manual Online
For 1990-2009 cars only

How to Load the Cartridge


Object Number: 1566750  Size: B3

To play discs in the changer, you must first load the cartridge with one to twelve discs (label side down). The cartridge contains 12 individual trays which hold one disc each and the trays should be loaded from the bottom of the cartridge to the top.

To load the cartridge, press the button on the back of the cartridge and pull gently on one of the trays. Remove the tray and place a disc on it with the label side down. If the disc is not inserted label side down (upside down), the disc will not play and an error will occur. Gently push the tray back into the cartridge slot. Repeat this procedure for loading up to 12 discs in the cartridge.


Object Number: 1566751  Size: B3

At least one compact disc should be loaded in the CD changer at all times. (When a compact disc is in the CD changer, the CD changer player mechanism is unlocked and allows maximum damping).

Once you have loaded the discs in the cartridge, slide open the door of the CD changer all the way to the right. Push the cartridge into the changer in the direction of the arrow marked on the top of the cartridge.

Close the door by sliding it all the way to the left. If the door is left partially open, the changer will not operate and an error will occur.

When the door is closed, the changer will begin checking for discs in the cartridge. This will continue for up to 1 1/2 minutes depending on the number of discs loaded.

The disc symbol will be displayed on the radio display to indicate that the cartridge is loaded. If no discs are present (disc symbol is not shown), the CD function is not available, and pressing the auxiliary (AX) button will cause no action.

All of the CD functions are controlled by the radio buttons except for ejecting the cartridge. Whenever a CD cartridge with discs is loaded in the changer, the "disc" symbol will appear in the radio display. If the CD changer is checking the cartridge for CD's, the "disc" symbol will flash in the display until the changer is ready to play. If the "AX" button is press during the CD changer initialization period, "CD" will flash along with the "disc" symbol until the CD changer is ready to play. When a CD begins playing, the display will show "CD", the disc symbol, the disc number, and the track number.

The CD changer can be selected while the radio or tape is playing. This will cause the radio to change to the CD mode. Selecting the CD changer while the tape is playing will cause the tape to stop, and the tape symbol will remain displayed for approximately five seconds, then the display will change to the time of day.

The discs and disc tracks will be played from the lowest to highest ordered number. When entering a new disc or track, the display will show the track number and disc number and the audio will be muted. After the highest number disc and track are played, the player will return to the lowest numbered disc and begin playing.

To eject the cartridge from the player, simply slide the CD changer door all the way open. The cartridge will automatically eject. Remember to keep the door closed whenever possible to prevent dirt and dust from getting inside the changer.

Radio Preset Buttons

The radio preset buttons (1-6) will change functionality when in the CD changer mode as explained below.

1 PREV Button: When you quickly press and release the PREV button, the beginning of the previous track will be selected and played. If the button is held down for more than 1 second, the player will continue to move to previous track selections until the button is released. If the PREV button is pressed at the start of the lowest numbered available track on a disc, the highest available track on the same disc will be played. If the PREV button is pressed during the Random Play mode, the previous track in the random sequence will be played. The PREV button must be pressed once for each previous random selection desired.

2 RDM Button : Pressing the random play (RDM) button in the CD changer mode will alternately turn the random play feature on or off. When the random play feature is on, the letters "RDM" will be displayed, and the discs loaded in the CD changer will have their tracks played in a random sequence. When the random play feature is on, the CD player will select a randomly chosen available disc and track and being playing. After completing the first random selection, the player will continue to play tracks from various discs in a random order until random play is turn off. Each time a random track is chosen, the display will be updated, showing the disc and track number. The display will return to the time of day approximately 5 seconds after playing begins. Random selection does not occur during the REV and FWD audible searching modes. In these cases, the track just before (for REV) or just after (For FWD) the track being played will be selected. When the track selected by REV or FWD is complete, random play will resume. To skip a selection chosen by the CD changer random play feature, push the NEXT button. To go back to the beginning of the selection being played, push the PREV button. The random play feature may be cancelled by pushing the RDM button a second time. It is also cancelled by ejecting and reloading the disc cartridge.

3 NEXT Button : When you quickly push and release the NEXT button, the player will stop playing the current track and begin playing the next track selection. If the button is held down for more than 1 second, the player will continue to move forward on the disc one track at a time until the button is released. If the last track on the disc is played when NEXT is pushed, the first track on the same disc will be played. Pushing the TAPE or AM/FM button before the search is completed will stop the disc and switch the system into the tape or radio mode. The CD symbol will remain displayed to indicate that the CD changer is available. Pushing the AX button again will cause the unit to return to the CD mode, starting at the beginning of the track that was playing before you pushed the TAPE or AM/FM button, if the cartridge has not been ejected. If the NEXT button is pushed during Random Play mode, the next track in the random sequence will be selected.

4 REV Button: If you press and hold the REV button while a disc is playing, the player will play in reverse at a rate of approximately 6 times the normal play speed. This feature allows you to sample the audio at a fast rate in reverse to locate a chosen passage. Because the disc is being sampled in reverse at a higher than normal speed, the audio will be recognized, but will not be of normal listening quality. Elapsed time is displayed while operating this feature. If a new track is encountered during the search, the updated disc and track numbers will be displayed for approximately 5 seconds. When the beginning of the disc is encountered, the player will stop until the button is released and then resume playing. The display will change to the time of day approximately 5 seconds after you release the REV button.

5 RPT Button : Pressing the repeat (RPT) button will alternately turn the repeat track feature on or off. When the repeat track feature is on, the letters "RPT" will be displayed. When the repeat feature is on, the current track will be repeated until the RPT button is pushed again. The repeat feature is also cancelled by pushing TAPE, PREV, RPM, or NEXT by cycling the ignition, or by turning off the radio power switch.

6 FWD Button: : When the FWD button is pushed and held during CD play mode, the player will play the disc at a rate of approximately 6 times the normal speed. This feature allows the user to sample the disc audio at a fast rate to locate a desired passage. Because the disc is being played at a higher than normal speed, the audio can be recognized, but will not be of normal listening quality. Elapsed time is displayed while operating this feature. If a new track is encountered during the search, the updated disc and track numbers will be displayed for approximately 5 seconds. When the end of the disc is encountered, the player will stop until the button is released and then resume playing. The display will change to the time of day approximately 5 seconds after you release the FWD button.

Functions of Other Important Buttons While in CD Mode

Auxiliary (AX) Button: Pushing the AX button will have no action when the CD is playing. To change modes, push either the AM/FM button or the TAPE button. The disc symbol will remain displayed to indicate that discs are in the player, but stopped. Once in radio mode, pushing the AX button will cause the system to switch back from radio mode and resume playing the disc. Once in tape mode, pushing the AX button will cause the system to switch back from tape mode and resume playing the disc. When switching back to CD from either radio or tape, disc play resumes from the disc and track prior to interruption, provided the cartridge has not been ejected.

NR (Compression) Button : The NR button is used in CD changer mode to turn the dynamic compression feature on or off. The compression feature processes the audio signal and makes quieter passages louder, allowing them to be heard more easily in your vehicle. When the feature is on, the letters "CMP" will be displayed.

RCL Button: : In CD mode, the RCL (Recall) pushbutton affects only the display with no other changes to the operation of the player. When you push the RCL button, the current disc and track number will be displayed and the letters "DISC" and "TRK" will be shown. After approximately 5 seconds, the display will again show the time of day.

AM/FM Button : In the CD mode, pushing the AM/FM button will cancel the CD operation, and restore the radio operation. The letters "CD" will be turned off, and the "disc" symbol will remain displayed to indicate that the CD changer is available.

Tape Button : The TAPE button is used in the CD mode to select tape play mode when a tape is present and stopped as indicated by the display of the tape symbol. When the tape button is pushed, the CD changer will stop and tape play will begin. The letters "CD" will turn off, and the tape track arrow will be displayed. The "disc" symbol will remain displayed to indicate that the CD changer is available. In CD mode, the TAPE button has no function when a tape is not loaded, and pushing this button will cause not action.

Button (EJECT) : The button (EJECT) is available in CD mode only if a tape cartridge is in the player and stopped. Pushing and releasing the button (EJECT) in the CD mode will cause the tape to be ejected with no other effect to the player operation. If not tape is present, pushing this button will cause not action. The eject function is available when the ignition is on or off.

SEEK Button (Disc Selection) : The SEEK buttons provide for forward and reverse disc selection. Seek directs the compact disc changer to find the beginning of the first available track on the next higher numbered available disc and resumes play from that point. SEEK direct the compact disc changer to find the beginning of the first available track on the next lower number available disc and resume play from that point. The SEEK button must be pushed once for each increase or decrease of the disc number. The disc number can be increased or decreased multiple times with wraparound at the lowest and highest available disc number. If only one disc is loaded in the CD changer, pushing seek will cause no action. Pushing the TAPE or AM/FM buttons before each search is completed will stop the disc and switch the system into the tape or radio mode. The "disc" symbol will remain displayed to indicate that the CD changer is available.

CD Errors: : Several conditions will generate errors which prevent the CD changer from operating normally. These include upside-down disc loading, moisture on the disc or changer, damaged discs, or improper loading or unloading of the disc. If you accidentally load a single disc into the cartridge with the label side up, initialization of that disc will no be completed. Except in random play mode, attempts to access the disc during play will result in "Err" being displayed for approximately 5 seconds. The next higher available properly loaded disc will be automatically selected by the system. In random play mode, the "bad" disc is ignored as if no disc is in the slot. "Err" is also displayed for approximately 5 seconds if moisture is present on the disc or the unit. The system will automatically select the next available disc and try again. If no disc can be played, "Err" remains on the display as the player retries each disc again and again until you cancel the CD mode by returning to radio or tape mode. If a disc is damaged and cannot be player, "Err" is displayed for approximately 5 seconds, and the next higher available track or disc is automatically selected. If an error occurs during loading or unloading, "Err" will be displayed for approximately 5 seconds. If this happens, the system will return to radio mode.