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

Byte 3 (Software Release Number)
This byte is stored in USN format and represents the release number of the ECU software set. Software 
revision numbers shall start at $01 and increment with each release. 
Bytes 4 and 5 (PROM Identifier)
These two bytes are stored in USN format and are used to provide a unique representation of a 
software version (e.g., 2000 NAO V6 PCM with level 2400 software = $09 $60). 
W
6
 = 
This DID may be written with service $3B at the discretion of the platform. 
Position 
1 
2 
3 
4 
5 
For Beta release with approved software and 
GMSUD 
B 
AA 
2 
2400 
calibrations. 2
nd
software release and software 
Hex value 
42 
AA 02 
09 
60 revision level = 2400 
Table C21: Definition of GM Bench Verification Information Data dataIdentifier 
DID Description 
R/W 
Data Type 
Len 
$B8 
GM Bench Verification Information (GMBVI) 
R/W
7
USN/ASCII 
5 
This DID contains five bytes of data used to provide information about bench verification during the 
development process. This DID is made up of the following components: 
Byte 1 and 2 (Verification Initials)
These two bytes are the ASCII representation of the first and last initials of the individual who authorized 
this software release by checking a sample version on the software integration bench. 
Bytes 3, 4 and 5 (Verification Date)
The data stored in bytes 3, 4, and 5 are saved in USN format and represent the date that the bench 
verification took place. The data is arranged in the following format: YY/MM/DD, where the Year (YY) 
will use 1900 as a base and be stored in byte 3. Month (MM) is stored in byte 4, and the day (DD) is 
stored in byte 5.