GM Service Manual Online
For 1990-2009 cars only

Cellular Telephone Module (w/UV8)

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

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

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

8 Digit GM Part Number: The scan tool displays the module GM part number.

Component Serial Number: The scan tool displays the module serial number.

OnStar® Vehicle Interface Unit (VIU) (w/UE1)

Module Information -- PROM ID: This displays the four digit number of the module PROM.

Module Information -- Master Flash ROM ID: This displays the calibration or program revision level used in the Master ROM.

Module Information -- Slave Flash ROM ID: This displays the calibration or program revision level used in the Slave ROM.

Module Information -- Julian Date Of Build: This displays the day of the year the module was built.

Module Information -- Year Module Built: This displays the four digit year of build.

Module Information -- 8 Digit GM Part Number: This displays the part number for the VIU.

Module Information -- Component Serial #8-11: This is the first partition of the serial number.

Module Information -- Component Serial #12: This is the second partition of the serial number.

Module Information -- Component Serial #13-16: This is the third partition of the serial number.

Module Information -- Component Serial # 17-18: This is the last partition of the serial number.

GPS Information -- Second: Gives second of current time as transmitted by GPS satellites.

GPS Information -- Hour: Gives hour of current time as transmitted by GPS satellites.

GPS Information -- Day: Gives current day as transmitted by GPS satellites.

GPS Information -- Month: Gives current month as transmitted by GPS satellites.

GPS Information -- Year: Gives current year as transmitted by GPS satellites.

GPS Information -- Minute: Gives current minute as transmitted by GPS satellites.

GPS Information -- Latitude: Gives current position (N/S) as calculated from GPS satellite information.

GPS Information -- Longitude: Gives current position (E/W) as calculated from GPS satellite information.

Amplifier

Mono Volume Control: The scan tool displays the cellular telephone volume in counts. Range: 0-255 counts.

Mute: The scan tool displays the state of the audio mute function (on or off) requested by the cellular telephone.

Phone Active: The scan tool displays the state (active or inactive) of the cellular telephone.