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

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

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

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

Battery Voltage: The scan tool displays 0-25.5 volts. The voltage measured from the modules battery positive voltage circuit to the modules ground circuit.

Battery Voltage Signal: The scan tool displays 0-25.5 volts. The voltage measured from the modules battery positive voltage circuit to the modules ground circuit.

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

Clock Status: The scan tool displays 12 hr or 24 hr.

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

Digital Radio Antenna: This parameter indicates the amount of current being used by the digital radio antenna by measuring the voltage drop across an internal resistor. Early design modules support the mV reading while later design modules support a mA reading.

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

Ign. Cycles Since Last: 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.

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

Manufacturing Site: The scan tool displays the manufacturing site information.

Manufacturing Shift Inf: The scan tool displays the manufacturing shift information.

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, noise is then measured in Microphone High.

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, noise is then measured in Microphone High.

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

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

Personalization Status: The scan tool displays Driver 1/2. The memory position the driver has selected as received by class 2 data.

Phone Signal: 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.

Preset Settings: 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 radios internal PROM.

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

Radio Audio Software Version: The scan tool displays the version of software.

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

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

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

Source ID: The scan tool displays which sound source has been selected (Tuner, CDX, Phone, Off).

Source Status: The scan tool displays which sound source has been selected (Tuner, CDX, Phone, Off).

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

Total CDX Hours:  The scan tool displays 0-999 hrs. The total number of hours the CD changer has been used.

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

TV Signal Strength: The scan tool displays decibels. The strength of the received signal.