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Page 187
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
Note: 
Since current draw during a programming event may drain a battery, nodes should failsoft to a state
which draws only necessary current.
8.17.2 Request Message Definition (Table 165).

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February 2010
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Table 165: ProgrammingMode Request Message
Data Byte Parameter Name
Cvt Hex Value Mnemonic
#1
ProgrammingMode Request Service Id
M
A5
SIDRQ
#2
sub-function = [
requestProgrammingMode
requestProgrammingMode_HighSpeed
enableProgrammingMode]
M
01
02
03
LEV_
RQPM
RQPM_HS
RQ_EPM
8.17.2.1 Request Message Sub-Function Parameter $Level (LEV_) Definition. 
The sub-parameters for this
service are indicated in Table 166.
Table 166: Definition of Sub-function Values
Hex Description
Cvt
00
reservedByDocument
This value is reserved by this document.
M
01
requestProgrammingMode
Request by the tester to verify the capability of the node(s) to enter into a normal speed
programming event.
M
02
requestProgrammingMode_HighSpeed
Request by the tester to verify the capability of the node(s) to enter into a high speed
programming event.
M
1
03
enableProgrammingMode
Request by the tester to have the node(s) enter into a programming event. This can only
be sent if preceded by one of the valid requestProgrammingMode messages (above).
M
04 thru
FF