GM Service Manual Online
For 1990-2009 cars only
8-Digit GM Part Number: The scan tool displays an 8- digit alphanumeric number. This is part number of the module.

8-Digit SGM Part Number: : The scan tool displays the GM Part Number of the module.

AM Pass A Stop Level: This is the first pass stopping level for the seek/scan feature. If nothing is found above this level, the radio will then go to the AM Pass B Stop Level.

AM Pass B Stop Level: This is the second pass stopping level for the seek/scan feature.

Audio Generator:: The scan tool displays 0-255 counts. The volume of the chime.

Auto Gain Control: The scan tool displays the amount of gain applied to a remote CD player input. This is a factory preset value and is not changeable.

Auto Volume Control: The scan tool displays On/Off. This is the state of the auto volume control function.

Balance Control: The scan tool displays 0-252 counts. The amount of left to right balance selected.

Band Number: The scan tool displays AM/FM1/FM2. The current band that the radio is in.

Bass Control: The scan tool displays 0-252 counts. The amount of bass selected.

Battery Voltage: The Scan tool displays 0-25.5 V. This is the voltage measured from the module's battery positive circuit to the ground circuit.

Calibration ID: The scan tool displays 0-9999. The number designating what calibrations the radio contains.

Calibration ID: : The scan tool displays the Calibration ID of the module.

CD Changer Disk Read Error: This scan tool displays 0-999. The number of CD read errors the CD changer has recorded.

CD Focus Error: The Scan tool displays 0-999. The number of CD focus errors the CD changer has recorded.

CD Loading/Unloading Errors: The scan tool displays 0-999. The number of CD loading/unloading errors the CD changer has recorded.

Chime: The scan tool displays On/Off indicating the requested state of the chime.

Chime Mode: The scan tool displays On/Off indicating the requested state of the chime.

Clock: The scan tool displays 12 hours or 24 hours.

Component Serial Number: The scan tool displays the serial number of the module.

Component Serial #8-11: The Scan tool displays 0-999. The internal programming codes of the module.

Component Serial #12: The Scan tool displays 0-99. The internal programming codes of the module.

Component Serial #13: The Scan tool displays 0-99. The internal programming codes of the module.

Driver Number: The Scan tool displays 1-2. The memory position the driver has selected as received by Class 2 lines.

DSP Level: The Scan tool displays 0-252. The amount of effect selected for DSP mode.

DSP Selected: The scan tool displays the equalization setting selected (vocal, front/driver seat, ambience, spacious, or off).

Fader Control: The scan tool displays 0-252 counts. The amount of front to rear fade selected.

FM Pass A Stop Level: This is the first pass stopping level for the seek/scan feature. If nothing is found above this level, the radio will then go to the FM Pass B Stop Level.

FM Pass B Stop Level: This is the second pass stopping level for the seek/scan feature.

Ignition Cycles Since Last DTC: The scan tool displays the number of ignition cycles since the last DTC was set.

Ignition Counter: The scan tool displays the number of ignition cycles.

Julian Date of Build: : The scan tool displays the module date of build in total calendar days.

Language: The scan tool displays what language is being displayed on the radio.

Master PROM ID: The scan tool displays 0-9999. The identification number of the radio internal PROM.

Microphone Low: The scan tool displays 0-255 counts. The amount of noise measured in the vehicle. This is the lower of two measurements. Once this has reached the limit, the noise measured is then displayed in Microphone High.

Microphone High: The scan tool displays 0-255 counts. The amount of noise measured in the vehicle. This is the higher of two measurements. Once Microphone Low has reached the limit, the noise measured is then displayed in Microphone High.

Mid Control: The scan tool displays 0-252 counts. The amount of mid range selected.

Mono Volume Control: The scan tool displays 0-99 counts. The volume selected for the phone output.

Mute: The scan tool displays On/Off indicating the state of mute.

Mute Button: The scan tool displays On/Off indicating the state of the mute button.

New VIN Counter: The Scan tool displays 0-99. The number of times the radio has been in different vehicles.

Phone Active: The scan tool displays Active/Inactive. Whether or not the phone is currently active.

Point of Sale: The scan tool displays the country the vehicle was sold in.

Power Mode: The scan tool displays what power mode the module is on.

Power Mode Setting: The vehicle configuration that the radio is set up for Deville, Seville, or Eldorado

Preset Status: The scan tool displays Home/Away. Whether the radio is set to home settings or away settings.

PROM ID: The scan tool displays 0-9999. The identification number of the radio internal PROM.

PROM ID for Audio:: The scan tool displays 0-9999. The identification number of the radio internal PROM.

PROM ID for Audio::  The scan tool displays the module PROM ID.

PROM ID for Navigation: The scan tool displays 0- 9999. The identification number of the radio internal PROM.

PROM ID for Navigation:: The scan tool displays the module PROM ID.

Radio ID: The scan tool displays the radio ID of the digital radio receiver.

Region Code: The scan tool displays the region the radio is set for (US, Asia, Australia, Europe, Saudi).

Signal Strength: The scan tool displays 0-255 decibels. This is the strength of the radio station that the radio is tuned to.

Slave PROM ID: The scan tool displays 0-9999. The identification number of the radio internal PROM.

Source Selected: The scan tool displays which sound source has been selected, Tuner, Cassette, CD/MD, CDX, Phone, Radio Off.

Theft Lock: The scan tool displays Active/Inactive. The scan tool displays active when the radio receives the incorrect VIN number across class 2 lines.

Total Cassette Hours: The Scan tool displays 0-999 hours. The total number of hours the cassette player has been used.

Total CD/MD Hours: The Scan tool displays 0-999 hours. The total number of hours the CD/MD player has been used.

Total Radio Hours: The Scan tool displays 0-999 hours. The total number of hours the radio has been used.

Treble Control: The scan tool displays 0-252 counts. The amount of treble selected.

TV Signal Strength:: The scan tool displays 0-255 decibels. Signal Strength for Tuned TV Station.

Volume Control: The scan tool displays 0-255 counts. The volume selected.

Year Model Built:: The scan tool displays what year the module was built.