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.

Antenna Signal: The scan tool displays 0-300. The signal from the antenna is measured in dBuV.

Auto. Set: The scan tool displays Active/Inactive. Whether or not the Auto Set feature is currently active.

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

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

CD Changer:  The scan tool displays Yes/No. The module displays Yes when the cd sense wire has been grounded to signal that a remote cd changer is present.

CD Focus Errors: The scan tool displays 0-999. The number of CD focus errors the radio has recorded.

CD Load/Unload Errors: The scan tool displays 0-999. The number of cd loading and unloading errors the radio has recorded.

CD Tracking Errors: The scan tool displays 0-999. The number of cd tracking errors the radio has recorded.

Component Serial # 13-1: The scan tool displays 0-9. The internal programing codes of the module.

Component Serial # 17-1: The scan tool displays 0-9. The internal programing 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.

Julian Date of Build: The scan tool displays 0-999. The month and year that the module was built.

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

Preset Control: The scan tool displays a Preset 1-6. The preset number when the radio is on a preset station.

Theft Armed: The scan tool displays Yes/No. The Scan tool displays Yes when the theft mode has been turned ON by recognizing a valid VIN #.

Theft Lock: The scan tool displays Yes/No. The scan tool displays Yes when the radio receives the incorrect VIN number from the PCM across class 2 lines.

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

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

Year Module Built:  The scan tool displays a 1990-2020. The production year the module was manufactured.

Digital Radio Antenna: The scan tool displays millivolts. This parameter indicates the amount of current being used by the digital radio antenna by measuring the voltage drop across an internal resistor. Typical value is 1200-1800 mV.

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.