Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Scan Tool Data Definitions
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 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 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.
Phone: The scan tool displays Present/Not Present. The module displays present when a phone is connected.
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.