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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
Table C27: Definition of Subnet Config Lists for GMLAN Expansion Buses dataIdentifier

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DID Description
R/W Data Type
Len
$BF 
Subnet_Config_List_GMLANChassisExpansionBus (SCLGCEB)
R/W
BIN
≥ 2
This DID contains the SCLGCEB.
Each bit represents one ECU (with unique Diagnostic Address, see Appendix D) that can exist on the
Chassis expansion bus subnet. A logic “1” indicates that a given ECU is present on the vehicle. The bit
mapping of ECUs must be documented in a CTS, SSTS, or supplemental diagnostic specification.
Example:
SAS Steering Angle Sensor
Position
1
2
Bit location
7
6 to 1
0
7 6 to 1
0 ---
Bit state
0
…
0
0
…
1 ---
DA (hex)
J3200
---
…
---
---
…
11
---
ECU name
---
…
---
---
…
SAS ---
Hex value
00
01
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Table C28: Definition of Boot Software Part Number dataIdentifier
DID Description
R/W
Data Type Len
$C0 
BootSoftwarePartNumber (BSPN)
R
USN
4
This DID contains BootSoftwarePartNumber information which is a 4-byte, unsigned numeric
representation of the 8-digit GM part number assigned to the boot software of the ECU. If a Boot
Software Alpha Code is used, then the Alpha Code associated with this part number shall be stored in
dataIdentifier $D0.
Position
1 2 3
4 ---
BootSoftwarePartNumber
16265965
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Hex value
00 F8 32 ED ---
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