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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
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17

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VIN
W 0
L
0
0
0
0
3
6
T
1 0 0 0 0 8 5
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
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