For 1990-2009 cars
8-Digit GM Part Number: This displays the part number for the vehicle communication interface mode (VCIM).
Component Serial Number 13-16: This is the third partition of the serial number.
Date: This is the date as synchronized with global positioning system (GPS) satellites.
Electronic Serial Number: This is the electronic serial number stored in the VCIM which is used by the OnStar® Call Center.
GPS Signal: This displays the status of a received GPS signal.
Julian Date of Build: This displays the day of the year the module was built.
Module ID: This displays the version of OnStar® which the vehicle is equipped with.
Signal Strength: This displays a calculated value for cellular reception signal strength. A higher number indicates a stronger signal.
Signal Type: This displays whether the Generation 6 OnStar® VCIM is currently operating in a digital or analog market.
Software ID: This displays the 3-digit number of the software version used on the OnStar® VCIM.
Time: This displays the time as synchronized with GPS Satellites.
Transceiver ID: This displays the ID number of the cellular tower that the OnStar® VCIM is using for cellular signal.
VCI Module Station ID: This is the station identification number stored in the VCIM which is used by the OnStar® Call Center.
Year Module Build: This displays the year the module was built.