General Specification Electrical Function gmw3110 General Motors Local Area Network Enhanced Diagnostic Test Mode Specification


Table C1: Definition of Vehicle Identification Number dataIdentifier



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Table C1: Definition of Vehicle Identification Number dataIdentifier 
DID Description 
R/W 
Data Type 
Len 
$90 
VehicleIdentificationNumber (VIN) 
R/W
1
ASCII 
17 
This DID contains the Vehicle Identification Number. The data content shall be specified by the vehicle 
manufacturer. If the VIN has not yet been programmed into the ECU permanent memory, those 
locations shall be either 
“$00” or “$FF”. All 17 digits must be programmed in order for the ECU to use 
this DID. If the ECU does not store all 17 digits, then the ECU shall use an application specific DID to 
store the VIN digits. 
W
1

Some Nodes may restrict the ability to write to this DID under certain operating conditions (e.g., 
based on security status). All write restrictions placed on this DID shall be agreed upon by the DRE, GM 
service, and GM manufacturing representatives. The write restrictions must be documented in the 
CTS/SSTS or other ECU specific diagnostic document referenced by the CTS or SSTS
.
Position 









10 
11 12 13 14 15 16 17 
VIN 

















Hex value 
57 
30 
4C 30 
30 
30 
30 
33 
36 
54 
31 30 30 30 30 38 35 
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GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 297 of 336 
Table C2: Definition of System Supplier Id dataIdentifier 

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