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

GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 311 of 336 
Table C30: Definition of End Model Part Number dataIdentifier 
DID Description 
R/W 
Data Type 
Len 
$CB 
EndModelPartNumber 
R/W
9
USN 
4 
This DID is used to identify the part number that represents the combination of 
hardware/software/calibrations present in the ECU as it is received in the vehicle assembly plant. This 
part 
number 
is 
also 
used 
in 
service 
to 
uniquely 
identify 
the 
combination 
of 
hardware/software/calibrations programmed into the ECU at the time the part is ordered. Converting the 
four byte USN value to decimal provides the 8-digit part number assigned by the division. If an Alpha 
Code is used, then the Alpha Code associated with this part number shall be stored in dataIdentifier 
$DB. 
W
9
 
=
 
This DID may or may not be updated at the conclusion of a programming event based on 
divisional practices. This DID is not required to be writeable if divisional practices do not require 
this part number to be updated after module programming. 
Position 
1 
2 
3 
4 
--- 
EndModelPartNumber 
16265965 
--- 
Hex value 
00 F8 32 ED --- 
Table C31: Definition of Base Model Part Number dataIdentifier 
DID Description 
R/W 
Data Type 
Len 
$CC 
BaseModelPartNumber (BMPN) 
R 
USN 
4 
This DID contains BaseModelPartNumber information which is used during SPS programming to identify 
a unique combination of ECU hardware and all non-reprogrammable software (e.g., Boot software). The 
BMPN must be stored in the ECU in a non-erasable memory area (e.g., boot sector of flash, or 
EEPROM). It shall not be possible to change the BMPN as part of a programming session or through 
diagnostic services when a programming session is not active. The BMPN of a service replacement 
ECU shall be identical to that of a Production ECU if both ECUs have the same hardware and non-
reprogrammable software. If an Alpha Code is used, then the Alpha Code associated with this part 
number shall be stored in dataIdentifier $DC. 
Position 
1 
2 
3 
4 
--- 
BaseModelPartNumber 
16265965 
--- 
Hex value 
00 F8 32 ED ---