GM Service Manual Online
For 1990-2009 cars only
8 Digit GM Part Number: This displays the part number for the VCIM.

Component Serial Number 13-16: This is the third partition of the serial number.

Electronic Serial Number: This is the electronic serial number stored in the VCIM which is used by the OnStar® Call Center.

Julian Date of Build: This displays the day of the year the module was built.

Module I.D. : This displays the version of OnStar® which the vehicle is equipped with.

Software I.D.: This displays the 3-digit number of the software version used on the OnStar VCIM.

VCI Module Station I.D. : 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.