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.

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

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 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.

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

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

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.

Theft Armed: The scan tool displays Yes/No/Learned VIN Number. 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 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 Module Built: The scan tool displays a 1990-2020. This is the production year the module was manufactured.