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



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DID Description 
R/W 
Data Type 
Len 
$92 
SystemSupplierId (SYSSUPPID) 

ASCII 

This DID contains SystemSupplierId information which identifies the ECU hardware supplier and the 
system type (System Group Identifier). The SYSSUPPID also contains a 2-character reserved field for 
future definition. The SYSSUPPID 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 SYSSUPPID during a 
programming session or via normal diagnostic services. The SYSSUPPID consists of a structured 
sequence of nine ASCII characters which conform to GM-SPS (GM Service Programming System) 
requirements. 
1. System Supplier Identifier (5 ASCII characters) (e.g., GM Powertrain = GMPT, DELCO = DELCO; 
SIEMENS = SIEM; BOSCH = BOSCH) 
Note:
For GM Powertrain and Siemens, the 5
th
ASCII character in this field shall be a space ($20). 
2. System Group Identifier (2 ASCII characters):
00=Powertrain, 01 = Engine, 02 = Transmission, 03 = Chassis, 04 = Body, all others reserved by 
document (RBD). 
3. Reserved area (Two ASCII characters) 
Position 









… 
SYSSUPPID 









… 
Hex Value 
44 
45 
4C 
43 
4F 
30 
31 
30 
30 
… 
Data Type 
SystemSupplierIdentifier 
System-
Grouped 
Reserved 
… 
Table C3: Definition of System Name OrEngineType dataIdentifier 
DID Description 
R/W 
Data Type 
Len 
$97 
SystemNameOrEngineType (SNOET) 
R/W 
ASCII 
≤ 20 
This DID contains the SystemNameOrEngineType which identifies the electronic system name (e.g., 
Automatic Transmission with 2 liter engine: GS820 X20XEV) or engine type (X30XE) installed. The data 
shall always be of type ASCII. The length is variable (depends on length of string) but shall not exceed 
20 characters. 
Position 









10 
11 
12 
… 
SNOET 











… 
Hex Value 
47 
53 
38 
32 
30 
20 
58 
32 
30 
58 
45 
56 
… 

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