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

Calibration ID: The scan tool displays the calibration ID for the module.

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

Julian Date of Build: The scan tool displays the module date of build in total calendar days.

New VIN Counter: The scan tool displays 0-99. The number of times the radio has been in different vehicles.

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

PROM ID for Audio: The scan tool displays the module PROM ID.

PROM ID for Navigation: The scan tool displays the module PROM ID.

Region Code: The scan tool displays the region the radio is set for.

Signal Strength for TV: The scan tool displays 0-255 decibels. The strength of the tuned TV station.

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

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

Year Model Built: The scan tool displays the module year built.