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/FM1/FM2. 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 Inserted: The scan tool displays Yes/No. The scan tool displays Yes when a cassette is inserted.

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 Metal: The scan tool displays Metal/Not Metal. The scan tool displays Metal when a metal cassette is inserted.

Cassette Side: The scan tool displays Bottom/Top. This indicates which side of the tape is being played.

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 Present/Not Present. The module displays present 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 Inserted: The scan tool displays Yes/No. The scan tool displays Yes when a CD is inserted.

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 Driver 1/Driver 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.

New VIN Counter: The scan tool displays 0-999. 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 identification number of the radio's internal PROM.

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

Source: The scan tool displays Off/Tuner/CD/Cassette. This indicates the current source of audio.

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