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 the part number of the module.

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

Amplifier: The scan tool displays Present/Not Present. The module displays present when a remote amplifier is connected.

Band Number: The scan tool displays AM/FM1/FM2. This is the current band setting.

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

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

Cassette Cut Tape: The scan tool displays 0-999. This is the number of cut tape errors the radio has recorded.

Cassette Load/Unload Errors: The scan tool displays 0-999. This is the number of cassette loading and unloading errors the radio has recorded.

Cassette Tight Tape: The scan tool displays 0-999. This is the number of cassette tight tape errors the radio has recorded.

CD Changer: The scan tool displays Connected/Not Connected. The module displays Connected when a remote CD changer is connected.

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

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

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

Day: The scan tool displays the day the software was created.

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.

Driver Number: The scan tool displays Driver 1 or Driver 2. This is the memory position the driver has selected as received by class 2 lines.

Electronic Serial Number: The scan tool displays the electronic serial number of the digital radio receiver.

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

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

Month: The scan tool displays the month the software was created.

Phone: The scan tool displays Present/Not Present. The module displays present when a phone is connected.

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

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

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

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

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

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

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

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

Year: The scan tool displays the year the software was created.

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