GM Service Manual Online
For 1990-2009 cars only
8-Digit GM Part Number: The scan tool displays an 8 digit alphanumeric number. The part number of the module.

AM Pass A Stop Level: This is the first pass stopping level for the seek/scan feature. If nothing is found above this level, the radio will then go to the AM Pass B Stop Level.

AM Pass B Stop Level: This is the second pass stopping level for the seek/scan feature.

Audio Software Version: The scan tool displays 0-9999. The identification number of the radios internal PROM.

Auto Volume Control: The scan tool displays On/Off. The state of the auto volume control function.

Band Number: The scan tool displays AM/FM1/FM2. The current band that the radio is in.

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

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

FM Pass A Stop Level: This is the first pass stopping level for the seek/scan feature. If nothing is found above this level, the radio will then go to the FM Pass B Stop Level.

FM Pass B Stop Level: This is the second pass stopping level for the seek/scan feature.

Ign. Cycles Since Last DTC: The scan tool displays the number of ignition cycles since the last DTC was set.

Language: The scan tool displays what language is being displayed on the radio.

Navigation Software Version: The scan tool displays 0-9999. The identification number of the radios internal PROM.

Point of Sale: The scan tool displays the country the vehicle was sold in.

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

Power Mode Config.: The vehicle configuration that the radio is set up for (Deville, Seville, or Eldorado).

Region Code: The scan tool displays the region the radio is set for (US, Asia, Australia, Europe, Saudi).

Signal Strength: The scan tool displays 0-255 decibels. The strength of the station that the radio is tuned to.

Source Selected: The scan tool displays which sound source has been selected (Tuner, Cassette, CD/MD, CDX, Phone, Radio Off).

Theft Lock Status: The scan tool displays Active/Inactive. The scan tool displays active when the radio receives the incorrect VIN number across Class 2 lines.

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

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