GM Service Manual Online
For 1990-2009 cars only

AM/FM Stereo Radio

PERFORMANCE SPECIFICATION (TYPICAL)

 

AMPLIFIED SECTION

 

Power Output RMS (Root Mean Square),

@ 3% THD (Total Harmonic Distortion), @ 14V Vcc

12.5 W per Channel

Frequency Response +/- 1dB

30 Hz - 10 kHz

Bass and Treble Range

+8.0 to - 13.0 dB (typical)

AM SECTION

 

AM Tuning Range

530 to 1710 kHz (10 kHz Steps)

Useable Sensitivity

24 dB[micro ]V (typical)

Signal-to-Noise Ratio

50 dB (minimum)

FM SECTION

 

FM Tuning Range

87.9 to 107.9 MHz (200 kHz Steps)

TV Channel 6

87.75 (87.7 on display)

Signal-to-Noise Ratio

58 dB (minimum)

3-dB Limiting Sensitivity

8 dBf (typical)

Alternate Channel Rejection

58 dB (minimum)

Stereo Separation, 1 kHz

35 dB (typical)

FEATURES AND BENEFITS

    • 6 AM / 12 FM Radio Station Presets: Programmable by following two steps:
        1. Tune in desired station on the desired band.
        2. Push and hold the desired preset button for approximately one second (until an audio confirmation beep is heard).
    • A.SET (Automatic Station Set): Samples and picks out the strongest radio stations on the band, starting from the lowest station frequency.
    • Electronic Tuning: Automatically locks in station signals for best possible reception.
    • Seek Tuning: Provides up and down seek capability for radio bands to search for the next receivable station.
    • Scan Tuning: Samples program selection for five seconds and then automatically moves to the next radio station. An audible tone indicates Scan mode searching.
    • Automatic Loudness Compensation: Full depth of sound can be heard at low volume levels.
    • Rotary Pull-Out Balance Control: Pull-out control allows balance adjustment, then the control pushes-in to lock the balance in place.
    • Rotary Pop-Out Bass Control: Pop-out control allows bass adjustment, then the control pushes-in out of the way and locks the bass in place.
    • Rotary Pop-Out, Then Pull Treble Control: Pop-out then pull control allows treble adjustment, then the control pushes-in out of the way and locks the treble in place.

The Time of Day (Clock) will be displayed when:

  1. The ignition is turned off and the radio power is either On or Off. (Press RCL button if back lighting is desired.)
  2. The ignition is turned On and the radio power is Off.
  3. The ignition is turned On, the radio is On, and the tune, seek, scan, or preset function has not been activated for ten seconds.
    • Setting the Time of Day (Clock):
        1. Push and hold the RCL (Recall) button.
        2. While holding the RCL button, push the left side of the Tune/Seek rocker button until the correct hour appears.
        3. While holding the RCL button, push the right side of the Tune/Seek rocker button until the correct minute appears.
        4. Release the RCL button when complete.
    • Dimming:
        All radios feature continuously dimmable nighttime incandescent back lighting for the graphics on the pushbuttons and trimplate. The incandescent back lighting voltage is supplied from the vehicle light switch and is grounded through the radio wiring harness and the radio ground strap. The internal lamps are controlled by the high side pulse width modulated (PWM) dimmer control circuit through the BCM.
        The LCD is backlit whenever ignition voltage is applied regardless if the radio power knob is on or off. When the vehicle's exterior lights are turned On, the interior lights knob, which is found to the left of the steering wheel, can be turned to adjust the illumination of the radio. Turning the knob clockwise makes the light get brighter, while turning the knob counter-clockwise results in the light being dimmer.

AM/FM Stereo Radio With In-Dash CD Player

PERFORMANCE SPECIFICATION (TYPICAL)

 

AMPLIFIED SECTION

 

Power Output RMS (Root Mean Square), @ 3% THD (Total Harmonic Distortion), @ 14VVcc

12.5 W per Channel

Frequency Response +/- 1dB

30 Hz - 10 kHz

Bass and Treble Range

-14.0 to +14.0 dB (typical)

AM SECTION

 

AM Tuning Range

530 to 1710 kHz (10 kHz Steps)

Useable Sensitivity

24 dBV (typical)

Signal-to-Noise Ratio

50 dB (minimum)

FM SECTION

 

FM Tuning Range

TV Channel 6

Signal-to-Noise Ratio

3-dB Limiting Sensitivity

Alternate Channel Rejection

Stereo Separation, 1 kHz

87.9 to 107.9 MHz (200 kHz Steps)

87.75 (87.7 on display)

60 dB (minimum)

8 dBf (typical)

58 dB (minimum)

35 dB (typical)

CD PLAYER SECTION

 

Frequency Response +/- 3 dB

Signal-to-Noise Ratio

Stereo Separation

Total Harmonic Distortion (@ 1kHz Tone)

Loading Time

Eject Time

20 Hz to 20 kHz (minimum)

60 dB (minimum)

50 dB (minimum)

0.1% (typical)

9 seconds (typical)

2 seconds (typical)

FEATURES AND BENEFITS

Includes noted features of AM/FM stereo radio (except for setting time of the day, balance, bass, and treble)

    • Setting the Time of Day (Clock):
        1. Push and hold the RCL (Recall) button.
        2. While holding the RCL button, push the upper side of the Tune/Seek rocker button until the correct hour appears.
        3. While holding the RCL button, push the lower side of the Tune/Seek rocker button until the correct minute appears.
        4. Release the RCL button when complete.
    • Bass, Treble, Fade, and Balance Adjustment: The MODE, +, and - buttons control and allow adjustment of all four modes. After switching to the desired mode by using the MODE button, the + and- buttons are used to adjust that particular mode.
    • Next and Previous Track Selection and Display: The CD player automatically locates the beginning of the next or current (then previous if pressed two times in a row) selection on a CD.
    • Forward and Reverse Audible Search: Plays the selection many times the normal speed to allow the user to search for a specific passage of a selection.
    • Random Play Button: Automatically plays tracks in a random order selected by a microprocessor in the radio.
    • Repeat Play Button: Repeats desired track of the CD.
    • On-Board Diagnostics: On-Board Diagnostics (OBD) are available to check:
      • If any diagnostic trouble codes (DTCs) have been set.
      • If the speakers are functioning correctly at two different tones.
      • If all of the segments on the LCD light up.
      • If all of the buttons are working.
      • What antenna signal strength is being read by the radio.

AM/FM Stereo Radio With Cassette Player and In-Dash CD Player With Optional Remote 6-Disc CD Changer/Player

PERFORMANCE SPECIFICATION (TYPICAL)

 

AMPLIFIED SECTION

 

Power Output RMS (Root Mean Square), @ 3% THD (Total Harmonic Distortion), @ 14VVcc

20 W per Channel

Frequency Response +/- 3Db

30 Hz - 10 kHz

Tone Control Ranges

CSTM (Custom) - Bass and Treble Ranges

POP

ROCK

C/W (Country/Western)

CLSC (Classic)

JAZZ

NEWS

FLAT

--

-13 to +8.0 dB

-1.4 to +2.6 dB

-4.0 to +2.8 dB

+2.5 to + 2.8 dB

-1.4 to +1.4 dB

+2.6 to +5.5 dB

-5.5 to -3.0 dB

0.0 to 0.0 dB

AM SECTION

 

AM Tuning

530 to 1710 kHz (10 kHz Steps)

Useable Sensitivity

24 dB[micro ]V (typical)

Ultimate Signal-to-Noise Ratio

50 dB (minimum)

Selectivity

20 dB (minimum)

FM SECTION

 

FM Tuning

87.9 to 107.9 MHz (200 kHz Steps)

TV Channel 6

87.75 (87.7 on display)

Ultimate Signal-to-Noise Ratio

58 dB (minimum)

3-dB Limiting Sensitivity

8 dBf (typical)

Alternate Channel Rejection

58 dB (minimum)

Adjacent Channel Selectivity

10 dB (minimum)

Frequency Response

100 Hz to 10 kHz +/- 4 dB

Stereo Separation, 1 kHz

20 dB (minimum)

TAPE DECK SECTION

 

Frequency Response +/- 3 dB

125 Hz to 8 kHz

Signal-to-Noise Ratio (CCIR weighted)

45 dB (minimum)

Stereo Separation

30 dB (minimum)

Dolby NR® (Noise Reduction) Effect

8 dB (minimum)

Wow and Flutter (National Audio Board)

0.18% WRMS (maximum)

Loading Time

4 seconds (typical)

Eject Time

3 seconds (typical)

CD PLAYER SECTION

 

Frequency Response +/- 3 dB

20 Hz to 20 kHz

Signal-to-Noise Ratio

60 dB (minimum)

Stereo Separation

50 dB (minimum)

Total Harmonic Distortion (@ 1kHz Tone)

0.1% (typical)

Loading Time

9 seconds (typical)

Eject Time

2 seconds (typical)

CD CHANGER/PLAYER SECTION

 

Frequency Response +/- 3 dB

20 Hz to 20 kHz

Signal-to-Noise Ratio

60 dB (minimum)

Stereo Separation

50 dB (minimum)

Total Harmonic Distortion (THD) @ 1kHz Tone

0.1% (typical)

Initialization Time (for correctly loaded magazine)

20 seconds (maximum)

Eject Time (for magazine)

5 seconds (maximum)

Cassette, In-Dash Compact Disc, and CD Changer/Player Function - Features and Benefits

    • 6 AM/12 FM Radio Station Presets: Programmable by following two steps:
        1. Tune in desired station on the desired band.
        2. Push and hold the desired preset button for approximately one second (until an audio confirmation beep is heard).
    • A. SET (Automatic Station Set): Samples and picks out the strongest radio stations on the band, starting from the lowest station frequency.
    • Electronic Tuning: Automatically locks in station signals for best possible reception.
    • Seek Tuning: Provides up and down seek capability for radio bands to search for the next receivable station.
    • Scan Tuning: Samples program selection for five seconds and then automatically moves to the next radio station. An audible tone indicates scan mode searching after button is held for more than 3 seconds.
    • Automatic Loudness Compensation: Full depth of sound can be heard at low volume levels.
    • Auto Tone Control (ATC):
        Allows the sound to be tailored to meet individual preferences. Seven different selectable preset tones are available along with the CSTM (custom) tone. The CSTM tone is set by pressing and rotating the BASS/TREB/FADE/BAL knob.
        The setting can be permanently or temporarily shown on the display by pressing and holding the BASS/TREB/FADE/BAL knob until an audible tone is heard.
    • Rotary Bass, Treble, Fade, and Balance Control Knob: The BASS/TREB/FADE/BAL knob allows the bass, treble, fade, and balance modes to be adjusted. Push the knob in until the desired mode is on the display, then rotate to adjust.
    • The Time of Day (Clock) will be displayed when:
        1. The ignition is turned Off and the radio power is either On or Off. (Press RCL button if back lighting is desired.)
        2. The ignition is turned On and the radio power is Off.
        3. The ignition is turned On, the radio is On, and the tune, seek, scan, or preset function has not been activated for ten seconds.
    • Setting the Time of Day (Clock):
        1. Push and hold the RCL (Recall) button.
        2. While holding the RCL button, push the left side of the auto tone button until the correct hour appears.
        3. While holding the RCL button, push the right side of the auto tone button until the correct minute appears.
        4. Release the RCL button when complete.
    • Dimming:
        All radios feature continuously dimmable nighttime incandescent back lighting for the graphics on the pushbuttons and trimplate. The incandescent back lighting voltage is supplied from the vehicle light switch and is grounded through the radio wiring harness and the radio ground strap. The internal lamps are controlled by the high side pulse width modulated (PWM) dimmer control circuit through the BCM.
        The LCD is backlit whenever ignition voltage is applied regardless if the radio power knob is on or off. When the vehicle's exterior lights are turned On, the interior lights knob, which is found to the left of the steering wheel, can be turned to adjust the illumination of the radio. Turning the knob clockwise makes the light get brighter, while turning the knob counter-clockwise results in the light being dimmer.
    • Remote Compact Disc Changer/Player Compatible: Radio functions operate a remotely located 6-disc CD changer/player.
    • Theft Deterrent: Refer to "Theft Deterrent Feature" in this service manual.
    • On-Board Diagnostics: On-board diagnostics (OBD) are available to check:
      • If any diagnostic trouble codes (DTCs) have been set.
      • If speakers are functioning correctly at two different tones.
      • If all segments on the LCD light up.
      • If all buttons are working.
      • What equalization mode the radio is set at.
      • What antenna signal strength is being read by the radio.
      • If the CD changer/player is connected and communicating with the radio.

Cassette Player Function - Features and Benefits

    • Power Loading/Unloading: Tape is loaded with power assist.
    • Auto Reverse Tape: Plays both sides of a tape with no need to eject.
    • Power Off Tape Protection: Prevents tape damage if the ignition is turned off while tape is in play mode.
    • Soft Touch Tape Controls: Controls tape functions: Previous (PREV), Next, Rewind (REW), and Fast Forward (FF).
    • Radio Monitor: The radio is played while the tape player is fast rewinding or fast forwarding a tape.
    • Next/Previous Music Search: The tape player automatically locates the beginning of the next or current selection.
    • Tape Side Changing: Changes side of the tape being played with the press of a button.
    • Dolby Noise Reduction (Switchable): Reduces hiss on Dolby encoded tapes.
    • Automatic Metal Tape Equalization: Allows better sound quality when using metal tapes.
    • Repeat Play Button: Repeats desired selection on the tape.
    • Fast Forward/Rewind, Next/Previous Functions: Rewinds or forwards the tape, until the function is disabled, to the desired location. The arrows on the display show which side of the tape is playing. The up arrow [utrif ] refers to the top side of the tape. The down [dtrif ] arrow refers to the bottom of the tape.
    • Tape Clean Indicator: Reminds the user to clean the cassette head after 30 hours of use.

Compact Disc (CD) Player Function - Features and Benefits

    • Power Loading/Unloading: CD is loaded with power assist.
    • Next and Previous Track Selection and Display: The CD player automatically locates the beginning of the next or current (then previous if pressed two times in a row) selection on a CD.
    • Random Play Button: Automatically plays tracks in a random order selected by a microprocessor in the radio.
    • Repeat Play Button: Repeats desired track of the CD.
    • Forward and Reverse Audible Search: Plays the selection many times the normal speed to allow the user to search for a specific portion of a selection.

Remote Compact Disc (CD) Changer/Player Function - Features and Benefits

    • CD Changer/Player Controls Integral to Radio: CD changer/player functions are controlled by selecting the mode using the radio head. No remote control is required. CD changer/player functions are displayed on the radio display when the CD/TP button is pressed and an arrow points to the CD changer/player symbol.
    • Seek Up and Down Disc Selection and Display: Use radio pushbuttons to select any CD in the CD changer/player.
    • Next and Previous Track Selection and Display: The CD changer/player automatically locates the beginning of the next or previous selection on a CD.
    • Fast Forward and Rewind Audible Search: The CD changer/player plays the selection many times the normal speed to allow the user to search for a specific portion of a selection.
    • Random Play Button: Automatically plays tracks in a random order selected by a microprocessor.
    • Repeat Play Button: Repeats desired track of CD.
    • Auto Compression Feature: Brings soft and loud passages into a more desirable listening range.
    • 6 CD Direct Loaded CD Magazine: Does not contain any CD trays to break or lose. Refer to "Handling the Compact Disc Magazine" in this service manual.

AM/FM Stereo With Cassette and 6 Disc In-Dash CD Changer/Player

PERFORMANCE SPECIFICATION (TYPICAL)

 

AMPLIFIED SECTION

 

Power Output RMS (Root Mean Square), @ 3% THD (Total Harmonic Distortion), @ 14VVcc

20 W per Channel

Frequency Response +/- 3Db

30 Hz - 10 kHz

Tone Control Ranges

CSTM (Custom) - Bass and Treble Ranges

POP

ROCK

C/W (Country/Western)

CLSC (Classic)

JAZZ

NEWS

FLAT

--

-13 to +8.0 dB

-1.4 to +2.6 dB

-4.0 to +2.8 dB

+2.5 to + 2.8 dB

-1.4 to +1.4 dB

+2.6 to +5.5 dB

-5.5 to -3.0 dB

0.0 to 0.0 dB

AM SECTION

 

AM Tuning Range

530 to 1710 kHz (10 kHz Steps)

Usable Sensitivity

24 dB[micro ]V (typical)

Signal-to-Noise Ratio

50 dB (minimum)

Selectivity

20 dB (minimum)

FM SECTION

 

FM Tuning Range

87.9 to 107.9 MHz (200 kHz Steps)

TV Channel 6

87.75 MHz (87.7 on display)

Signal-to-Noise Ratio

58 dB (minimum)

3-dB Limiting Sensitivity

8 dBf (typical)

Alternate Channel Rejection

58 dB (minimum)

Adjacent Channel Sensitivity

10 dB (minimum)

Frequency Response (+/- 4 dB)

100 Hz to 10 kHz

Stereo Separation, 1 kHz

35 dB

CD PLAYER SECTION

 

Frequency Response (+/- 3 dB)

20 Hz to 20 kHz

Signal-to-Noise Ratio

60 dB (minimum)

Stereo Separation

50 dB (minimum)

Total Harmonic Distortion (@ 1kHz Tone)

0.10%

Loading Time (for a single CD)

9 seconds

Eject Time (for a single CD)

2 seconds

AM/FM Stereo With Cassette and 6 Disc In-Dash CD Changer/Player - Features and Benefits

    • 6 AM / 12 FM Radio Station Presets: Programmable by following two steps:
        1. Tune to desired station
        2. Press and hold the desired preset button for approximately one second (until an audio confirmation beep is heard).
    • A. SET (Automatic Station Set): Automatically programs the preset buttons to the strongest local radio stations. The originally programmed presets are retained.
    • Electronic Tuning: Automatically locks in station signals for best possible reception.
    • Seek Tuning: Provides up and down seek capability for radio band to search for the next receivable station.
    • Scan Tuning: Samples station selections for five seconds and then automatically moves to next station.
    • Automatic Loudness Compensation: Full depth of sound can be heard at low volume levels.
    • Auto Tone Control (ATC):
        Allows the sound to be tailored to meet individual preferences. Seven different selectable preset tones are available along with the CSTM (custom) tone. The CSTM tone is set by pressing and rotating the BASS/TREB/FADE/BAL knob.
        The setting can be permanently or temporarily displayed by pressing and holding the BASS/TREB/FADE/BAL knob until an audible tone is heard.
    • Rotary Bass, Treble, Fade, and Balance Control Knob: The BASS/TREB/FADE/BAL knob allows the bass, treble, fade, and balance. Push the knob until the desired mode is displayed, then rotate knob to adjust.
    • The Time of Day (Clock) will be displayed when:
        1. The ignition is turned Off and the radio power is either On or Off.
        2. The ignition is turned On and the radio power is Off.
        3. The ignition is turned On, the radio is On, and the tune, seek, scan, or preset function has not been activated for ten seconds.
    • Setting the Time of Day (Clock):
        1. Push and hold the RCL (Recall) button.
        2. While holding the RCL button, push the left side of the auto tone button until the correct hour appears.
        3. While holding the RCL button, push the right side of the auto tone button until the correct minutes appears.
        4. Release the RCL button when complete.
    • Dimming:
        All radios feature continuously dimmable back lighting for the graphics on the push buttons and trim plate. The LCD display is back lit in ignition On or (Accy) accessory positions.
    • Theft Deterrent Feature: Refer to "Theft Deterrent Feature" in this service manual.
    • On-Board Diagnostics: On-board diagnostics (OBD) are available to check:
      • If any diagnostic trouble codes (DTCs) have been set.
      • If speakers are functioning correctly at two different tones.
      • If all segments on the LCD light up.
      • If all buttons are working.
      • Equalization mode setting
      • Signal strength read by the radio.

Cassette Player Function - Features and Benefits

    • Power Loading/Unloading: Tape is loaded or ejected with power assist.
    • Auto Reverse: Plays both sides of a tape with no need to eject and reload.
    • Power Off Tape Protection: Prevents tape damage if the ignition is turned off while tape is in play mode.
    • Soft Touch Tape Controls: Controls tape functions: Previous (PREV), Next, Rewind (REW), and Fast Forward (FF).
    • Radio Monitor: The radio is played while the tape player is fast rewinding or fast forwarding a tape.
    • Next/Previous Music Search: The tape player automatically locates the beginning of the next or current selection.
    • Tape Side Changing: Changes side of the tape being played with the press of a button.
    • Dolby Noise Reduction (Switchable): Reduces hiss on Dolby® encoded tapes.
    • Automatic Metal Tape Equalization: Optimizes sound quality when using metal tapes.
    • Repeat Play Button: Repeats desired selection on the tape.
    • Fast Forward/Rewind, Next/Previous Functions: Rewinds or forwards the tape to the desired location, until the function is disabled.
    • Tape Clean Indicator: Reminds the user to clean the cassette head after 30 hours of use.

Compact Disc (CD) Player Function - Features and Benifits

    • 6 Disc Capacity: CDs can be loaded into any location individually or sequentially using the "Load/Eject All" feature.
    • Power Loading/Unloading: CD is loaded or ejected with power assist.
    • Next and Previous Track Selection and Display: Automatically locates the beginning of the next or current selection. If PREV is pressed twice, the previous track is selected.
    • Random Play Button: Automatically plays tracks in a random order.
    • Repeat Play Button: Repeats desired track of the CD.
    • Forward and Reverse Audible Search: Plays the CD above normal speed at a reduced volume to allow the user to search for a specific portion of a selection.