The Radio/Audio System consists of 1 of 3 levels of audio entertainment:
• | Base Level |
• | Uplevel |
• | Luxury Level |
All 3 levels of audio entertainment contain a speaker system that is appropriate for each radio/audio level and a choice of radios that contain various options.
Base Level Audio System | Uplevel Audio System | Luxury Audio System | ||
---|---|---|---|---|
UM7 Radio with AM/FM Stereo | UM6 Radio with AM/FM Stereo and Auto-Reverse Cassette | UL0/UP0 Radio with AM/FM Stereo and Auto-Reverse Cassette. UP0 includes a single CD Remote Playback Device | UN0 Radio with AM/FM Stereo and CD Player | UL1 Radio with AM/FM Stereo and Auto-Reverse Cassette |
Fixed Mast Antenna | Fixed Mast Antenna | Fixed Mast Antenna | Fixed Mast Antenna | Fixed Mast or Diversity Antenna |
-- | -- | Optional Remote Playback Device- CD Changer | Optional Remote Playback Device- CD Changer | Remote Playback Device - In-dash CD Changer |
-- | -- | Audio Amplifier-Utilities/Suburban Only | Audio Amplifier-Utilities/Suburban Only | BOSE Audio Amplifier |
-- | -- | Optional Rear Seat Audio Controller | Optional Rear Seat Audio Controller | Rear Seat Audio Controller |
-- | -- | -- | -- | Steering Wheel Controls |
• | The ignition switch must be in the ACCESSORY or RUN position to operate the radio. |
• | The radio power switch is integral with the volume control. |
• | Use the radio power switch/volume control knob in order to turn the system ON and OFF and to control the volume. |
• | Turn the radio power switch clockwise in order to turn the system ON or to increase the volume. |
• | Turn the radio power switch counterclockwise in order to turn the system OFF or to decrease the volume. |
• | The RECALL function can only be performed with the radio ON. |
• | Press the volume control knob to toggle the display between the time of day or the radio frequency. |
• | Press the volume control knob to briefly display the time of day while the radio is turned OFF. |
Press the tune knob in order to change the radio band between AM and FM. The display will indicate the current band and the last radio frequency that was selected on that band.
• | Rotate the TUNE knob clockwise in order to increase the AM or FM frequency. |
• | Rotate the TUNE knob counterclockwise in order to decrease the AM or FM frequency. |
• | Press the right arrow button in order to tune into the next station higher in frequency. |
• | Press the left arrow button in order to tune into the next station lower in frequency. |
Up to 14 stations can be preset into the radio's memory using the numbered push buttons (1,3,5, and 7). In order to preset 4 AM and 4 FM stations, perform the following steps:
In order to preset 3 additional AM and 3 additional FM stations perform the following steps:
Important: This diversity antenna system is comprised of 3 glass mounted antennas, a radio antenna module, and an FM impedance matching module. The primary AM and FM antennas are an integral part of the right rear quarter glass and are connected to the radio antenna module. The secondary FM antenna is an integral part of the left rear quarter glass and is connected to the FM impedance matching module. The radio antenna module, located in the headliner above the right rear quarter glass, processes the antenna reception signals and phase aligns them to create one strong signal. The FM impedance matching module, located in the headliner above the left rear quarter glass, boosts the secondary antenna signal and transmits it to the radio antenna module.
The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition. If the test leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. If the test leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems. Perform the Antenna System Test and test the antenna coax cable prior to performing any of the following tests.• | The radio antenna module is not grounded properly. The module grounding screws should be clean and tight. The antenna module ground is either a chassis ground or a ground strap. Measure the resistance from the antenna module base plate to a good ground. Resistance should be 0.20 ohms or less. Find and correct the condition if the resistance is out of specification. |
• | The antenna enable signal is not present at the radio antenna module. This could be caused by an output failure of the radio or an open/shorted antenna enable signal circuit. In order to test the antenna enable signal circuit, the radio must be ON and tuned to the FM band. Disconnect the radio antenna module. Measure the voltage from the antenna enable signal circuit of the radio antenna module to a good ground. Voltage measured should be near 12 V. If the specified voltage is measured, test the antenna enable signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If no failures were found, replace the radio. Refer to Radio Replacement for service procedure. |
• | The FM composite signal circuit to the radio antenna module is open or shorted to ground. Test the FM composite signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. |
• | The feed coax at the radio antenna module has been inadvertently swapped with the FM impedance matching module crossover coax. Ensure that the feed coax, marked with a yellow band, is in the correct socket on the radio antenna. |
• | Improper retention of the antenna cable in the floating retainer. Poor or no connection with the radio will result when the radio is installed if the antenna cable is not properly attached in the floating retainer. Inspect the antenna cable for movement in the floating retainer. Replace the antenna cable if movement is found. |
• | Defective radio antenna module. Replace radio antenna module. Refer to Radio Control Module Replacement for service procedure. |
• | Defective AM antenna. |
• | Defective radio antenna module. Replace radio antenna module. Refer to Radio Control Module Replacement for service procedure. |
• | Defective primary or secondary FM antenna |
• | Defective radio antenna module. Replace radio antenna module. Refer to Radio Control Module Replacement for service procedure. |
• | Defective FM impedance matching module. Replace FM impedance matching module. Refer to Radio Control Module Replacement for service procedure. |
• | Slide the BASS lever up in order to increase the bass response. |
• | Adjust the BASS lever down in order to decrease the bass response. |
• | Slide the TREB level up in order to increase the treble response. |
• | Slide the TREB lever down in order to reduce the noise if the station is weak or noisy. |
• | Turn the BAL control knob behind the VOLUME knob to select more or less sound, distributed between the left or the right speakers. |
• | The middle position will deliver an equal balance of sound between the left and right speakers. |
• | Turn the FADE control knob behind the TUNE knob to select more or less sound, distributed between the front and rear speakers. |
• | The middle position will deliver an equal balance of sound between the front and rear speakers. |
Tapes are end-loaded into the cassette player.
Longer running tapes may not work well in these players because they are usually too thin.
An arrow indicates which side of the tape is being played.
Press the volume control knob to change from one side of the tape to the other.
Press the EJECT push button in order to remove the tape or in order to stop the tape and switch to the radio.
• | Push the PWR-VOL knob in order to turn the radio ON and OFF. |
• | Rotate the volume control clockwise in order to increase the volume. |
• | Rotate the volume control counterclockwise in order to decrease the volume. |
• | The RECALL function can only be performed with the radio ON. |
• | Press the RECALL push button to toggle the display between the time of day or the radio frequency. |
• | Press the RECALL push button to briefly display the time of day while the radio is turned OFF. |
• | In order to use the SCV, adjust the volume to the listening level you want and move the control ring behind the PWR-VOL knob to adjust the SCV. |
• | The volume level automatically adjusts to compensate for road and wind noise as you drive. |
• | As you drive, the volume level will change in order to compensate for the noise present at any particular speed. |
• | Each detente on the SCV allows for more compensation at a faster rate. |
• | Press the AM/FM push-button to switch between AM, FM1, and FM2. |
• | The display indicates the current band. |
• | Press the right arrow key in order to tune into the next higher frequency. |
• | Press the left arrow key in order to tune into the next lower frequency. |
Audio is muted during the SEEK operation. |
Up to 18 stations (6 AM, 6 FM1, and 6 FM2) can be preset into the radio's memory using the 6 numbered push buttons. In order to preset a station in memory, perform the following steps:
The AUTO TONE that you selected will also be automatically selected for that push button.
Any stations already stored in preset memory can be sampled by the PSCAN mode.
PSCAN will scan each of the presets and stop for a few seconds.
PSCAN appears in the display whenever the tuner is in the PSCAN mode.
If 1 of the stations stored on a push-button is weak, the radio display shows the channel number (P1-P6) for several seconds before advancing to the next preset station.
The automatic tone control (ATC) feature tailors the equalization to the type of broadcast being received.
Note the graph and words in the display for each press of the push button.
If the ignition is ON but the radio is OFF, the tape will begin playing.
A tape symbol, accompanied by tape direction arrows, is shown in the center of the graphic display whenever a tape is playing.
For metal tapes, "DD" will be displayed.
An arrow indicates which side of the tape is being played.
• | Press the PREV or the SEEK left arrow push button in order to search for the previous selection. |
The tape direction arrow blinks during SEEK operation. |
• | A minimum 3 second blank gap is required for proper operation. |
• | Audio is muted during SEEK. |
Press the PROG push button in order to switch from one side of the tape to the other.
• | Press the NEXT or the SEEK right arrow push button in order to search for the next selection. |
• | A minimum of a 3 second gap is required for the player to stop at the beginning of a selection. |
• | The tape direction arrow will blink during the SEEK operation. |
• | Press REV in order to rewind the tape. The tape rapidly reverses to the beginning of the cassette or until you press the REV push-button a second time. |
The radio plays the last selected station during the REV operation. |
• | The tape direction arrow blinks during REV operation. |
Dolby Noise Reduction is manufactured under a license from Dolby Laboratories Licensing Corporation. Dolby® and the "DD" symbol are trademarks of Dolby Laboratories Licensing Corporation.
Press the AM-FM button in order to switch from tape to radio.
• | The disc is upside down. |
• | The disc is dirty, scratched, or wet. |
• | There is too much moisture in the air. |
• | Wait an hour and try again. |
• | The vehicle is operating on a very rough road. |
• | The disc player is very hot. |
• | Press EJECT in order to eject the disc from the CD player. |
• | A disc that has been ejected but not removed from the player will be pulled back in within 30 seconds. |
• | This protects the disc and the player from damage. |
• | The disc does not play. |
• | In order to remove the disc, press the EJECT button and remove the disc from the player. |
In order to operate the Compact Disc player, perform the following steps:
The track number will also be displayed .
• | An upside down disc |
• | A dirty, scratched, or wet disc |
• | Too much moisture in the air |
• | If there is too much moisture in the air, wait about 1 hour and try again. |
• | The vehicle is operating on a very rough road. |
The PROG button functions only when the vehicle is equipped with a 12-disc changer.
Press the NEXT button in order to advance to the next track on the disc.
RANDOM will appear on the display.
• | Press EJECT in order to eject the disc from the CD player. |
• | A disc that has been ejected but not removed from the player will be pulled back in within 30 seconds. |
This protects the disc and the player from damage. |
• | The disc does not play. |
• | In order to remove the disc, press the EJECT button and remove the disc from the player. |
The compact disc changer plays up to six standard size CDs continuously. Individual CDs may be loaded or ejected into or from any position. A green light on each numbered button indicates a CD is loaded in the respective position. An amber light on a numbered button indicates that a CD is playing. When loading CDs, the loading slot indicators turn amber to indicate that the player is ready to accept a CD. CDs can be loaded or ejected with the radio or the ignition being on or off.
Use the following steps to load a single CD into the CD Changer:
Use the following steps to load multiple CDs into the CD Changer:
Press this button or the SEEK left arrow to go to the previous track if the current selection has been playing for less than eight seconds. If the PREV button is pressed and the current selection has been playing for more than eight seconds, it will go to the beginning of the current selection. If you hold or press this button more than once, the player will continue moving back through the CD. The sound will mute while seeking.
Press this button to select a CD. The CD number and track number will be displayed.
Press this button or the SEEK right arrow to go to the next track. If you hold the button or press it more than once, the player will continue moving forward through the CD. The sound will mute while seeking.
Press and hold this button to reverse quickly through a track selection. Release it to resume playing.
Press and hold this button to advance quickly through a track selection. Release it to resume playing.
Press the right arrow to seek to the next selection on the CD. Press the left arrow to search for the previous selection on the CD. The sound will mute while seeking.
Press this button to hear the tracks in random, rather than sequential, order. DSC will appear on the radio display, which will randomly play the tracks on the current CD. Press P.SCAN again to make the radio display ALL, which will randomly play all loaded CDs. Press P.SCAN again to turn off random play, OFF will appear on the radio display.
Press this button if you have a CD loaded into the changer and the radio is turned on, to play a CD. Press AM FM to return to the radio when a CD is playing. Press CD TAPE to switch between the tape and CD changer if all are loaded.
Important: Read all steps before starting the procedure.
If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 4. If SEC appears on the display in step 4, the system has already been activated. To change the code, the old code must be removed first.In order to activate the Theftlock™ system, perform the following steps:
Important: Read all steps before starting the procedure.
If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 4. If SEC appears on the display in step 4, the system has already been activated. To change the code, the old code must be removed first.In order to activate the Theftlock™ system, perform the following steps:
Important: Read all steps before starting the procedure.
If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 4.In order to unlock the Theftlock™ system after a power loss, perform the following steps:
If the wrong code is entered more than eight times, INOP will appear on the display.
Wait 1 hour before attempting to unlock the radio again.
This time only 3 attempts will be allowed before INOP appears on the display.
If this happens you must wait 1 hour before attempting to unlock the radio again.
Important: Starting in 1995, a factory back-up code can be used to erase the original code if it is unknown.
Have account number ready to enter when asked. Account number is your 5 digit dealer code followed by one of these numbers:• | Chevrolet - 1 |
• | Pontiac -2 |
• | Oldsmobile -3 |
• | Buick -4 |
• | GMT -5 |
• | Cadillac -6 |
• | GM Canada -7 |
• | Saturn -8 |
In order to unlock the Theftlock™ system when code is unknown, perform the following steps:
If the back-up code does not unlock the radio, try reversing the first and last three digits of the display code.
If this is unsuccessful, call Delco Electronics to obtain a new factory back-up code.
Important: If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 3.
In order to disable the Theftlock™ feature, enter the user code as follows:
The Rear Seat Audio Controller feature allows the rear seat passengers to listen to a different music source than the front seat passengers including the cassette tape and the remote compact disc (CD) players. For example, the rear seat passengers may listen to the cassette or CD through headphones while the driver listens to the radio through the front speakers. The rear seat passengers have control of the volume for each headphone. Be aware that the primary radio controls always override the rear seat audio controls.
The sound will mute while seeking. The SEEK button is inactive when the front radio is also using the SEEK feature. Use the following procedure in order to seek:
Use the following procedure in order to seek selections on a cassette tape:
Use the following procedure in order to seek selections on a compact disc:
Press this button in order to turn the rear seat audio system ON or OFF. The rear speakers mute when the power is turned ON. You may operate the rear seat audio functions even when the primary radio power is off.
Press the AM/FM button in order to switch between AM, FM1 and FM2. The selection appears on the display. If the front passengers are already listening to AM-FM, the rear seat audio controller will not switch between the bands and cannot change the frequency.
Use the following procedure in order to switch between listening sources:
The front passenger must be listening to something different for the PSET PROG to operate. Press the PSET PROG in order to use the following functions:
• | To seek through your preset radio stations that are set on your primary radio push-buttons. |
• | To go to the other side of the cassette tape while the cassette is playing. |
• | To change discs when a compact disc is playing. This button will no operate if used with a single remote compact disc player. |
The upper VOL knob, the upper headphone jack, and the lower VOL knob controls the lower headphone jack.
Use the following procedure in order to operate the volume control:
Press this button to play a station you have programmed on the radio preset buttons on the selected band. If a cassette tape is playing, press this button to play the other side of the tape. If a compact disc is playing in the console-mounted CD changer, press this button to go to the next available CD.
Press the up arrow to tune to the next radio station and the down arrow to tune to the previous radio station. If a cassette tape or compact disc is playing, the player will advance forward with the up arrow to the next track or backward with the down arrow to the previous track.
Press this button to silence the system. Press it again to turn on the sound.
Press the up or down arrow to increase or decrease volume