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.

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/FM/FM1. This is the current band setting.

Battery Voltage: The scan tool displays 0-25.5 volts. This is the voltage 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.

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.

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

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 modules support the mV reading, while later modules support the mA reading

Driver Number: The scan tool displays Driver 1/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.

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

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

New VIN Counter: The scan tool displays 0-99. This is the number of times a new VIN has been received.

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

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

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

Sequence Number: The scan tool displays 0-9999. This is the sequence number in which the module was built.

Single CD Track Number: The scan tool displays 0-99. This is the current track being played.

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

Source: The scan tool displays Off/Tuner/CD. This indicates the current source of audio. Off will be displayed when digital radio audio is the current source.

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 Yes/No. The scan tool displays Yes when the radio receives the incorrect VIN from the PCM across Class 2 lines.

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.