For 1990-2009 cars
8-Digit GM Part Number: This displays the part number for the vehicle communication interface mode (VCIM).
Component Serial Number 13-16: This is the third partition of the serial number.
Date: This is the date as synchronized with global positioning system (GPS) satellites.
Electronic Serial Number: This is the electronic serial number stored in the VCIM which is used by the OnStar® Call Center.
GPS Signal: This displays the status of a received GPS signal.
Julian Date of Build: This displays the day of the year the module was built.
Module ID: This displays the version of OnStar® which the vehicle is equipped with.
Signal Strength: This displays a calculated value for cellular reception signal strength. A higher number indicates a stronger signal.
Signal Type: This displays whether the Generation 6 OnStar® VCIM is currently operating in a digital or analog market.
Software ID: This displays the 3-digit number of the software version used on the OnStar® VCIM.
Time: This displays the time as synchronized with GPS Satellites.
Transceiver ID: This displays the ID number of the cellular tower that the OnStar® VCIM is using for cellular signal.
VCI Module Station ID: This is the station identification number stored in the VCIM which is used by the OnStar® Call Center.
Year Module Build: This displays the year the module was built.

#### Entertainment Definitions

8 Digit GM Part Number: The scan tool displays the part number of the module.
Balance: The scan tool displays -50 to +50. The Balance between the right and left audio output.
Bass: The scan tool displays 0-100%. The percentage of bass selected at the radio.
Battery Voltage: The scan tool displays 0-18 Volts. The Voltage measured from the modules ignition positive voltage circuit to ground.
Cal. Module 1 Part No.: The scan tool displays the part number of the modules software.
Cal. Module 1 Suffix: The scan tool displays the suffix of the modules software.
Chime Volume: The scan tool displays 0-100%. The percentage at which the chime volume has been calibrated to.
Componet Serial Number: The scan tool displays the serial number of the module.
Day: The scan tool displays the day the software was created.
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.
Fade: The scan tool displays -50 to +50. The Fade between the front and rear audio output.
Ignition Counter: The scan tool displays the number of ignition cycles.
Ignition Since Current DTC: The scan tool displays 0-225 Cycles. The number of ignition cycles since a current DTC was set.
Midrange: The scan tool displays 0-100%. The percentage of midrange selected at the radio.
Month: The scan tool displays the month the software was created.
New VIN Counter: The scan tool displays 0-99. The number of times the radio has been in different vehicles.
Operational S/W Part No: The scan tool displays the part number of the modules software.
Operational S/W Suffix: The scan tool displays the suffix of the modules software.
Power Mode: The scan tool displays what power mode the module is on.
Radio ID: The scan tool displays the radio ID of the digital radio receiver.
Signal Strength: The scan tool displays 0-225 dB. The signal strength of the radio frequency.
Software Version: The scan tool displays the version of software.
Treble: The scan tool displays 0-100%. The percentage of treble selected at the radio.
Volume: The scan tool displays 0-100%. The percentage of volume selected at the radio.
Year: The scan tool displays the year the software was created.

#### Navigation Definitions

8-Digit GM Part Number: The scan tool displays an 8 digit numeric number. The part number of the module.
Amplifier: The scan tool displays Present or Not Present. The scan tool displays Present when the amp sense wire has been grounded to signal that an amplifier is present.
Amp Type: The scan tool displays Bose/Non-Bose, the type of amplifier installed in the vehicle.
Antenna Enable: The scan tool displays Active/Inactive.
Band Number: The scan tool displays AM/FM1/FM2. The current band that the radio is in.
Calibration ID: The scan tool displays 0-9999. The number designating what calibrations the module contains.
CD Changer: The scan tool displays Connected/Not Connected. The scan tool displays Connected when the radio receives Class 2 information from the CD changer.
Channel Number: The scan tool displays the channel the radio is tuned to.
Driver Number: The scan tool displays Driver 1-2. The memory position the driver has selected as received by Class 2 lines.
Fan Control: The scan tool displays the status of the fan.
Julian Date of Build: The scan tool displays 0-999. The day of the year that the module was built.
New VIN Counter: The scan tool displays 0-99. The number of times a new VIN number has been set in the radio.
Phone: The scan tool displays Present or Not Present. The scan tool displays Connected when the radio receives Class 2 information from the phone module.
Power Mode Config.: The scan tool displays the current power mode of the vehicle.
Preset Control: The scan tool displays Preset 1-6 when the radio is on a preset station, or Not A Preset when the radio is not on a preset station.
PROM ID: The scan tool displays 0-9999. The identification number of the modules internal PROM.
Signal Strength: The scan tool displays the strength of the received signal in dB.
Theft Armed: The scan tool displays Learned VIN/No VIN. The Scan tool displays Learned VIN when the theft mode has been turned ON by recognizing a valid VIN.
Theft Lock: The scan tool displays Locked/Unlocked. The scan tool displays Unlocked when the radio receives the correct VIN information from the PCM via Class 2.
Year Module Built: The scan tool displays a 1990- 2020, the production year the module was manufactured.