Duramax LBZ/LMM DSP5 User Guide
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www.efilive.com
Save the file with a new name,
File > Save As
. Maybe something like
‘My Truck Base DSP5 Conversion.ctz’
Close the tune file by selecting,
File > Close Tuning File
.
Reopen the file so EFILive will recognise the file is a DSP
5
converted operating
system. Please also take note of the new operating system (OS) number of the
DSP
5
converted file.
DSP2
will become 2xxxxxxx (eg
1
2606128 to
2
2606128)
DSP5
will become 5xxxxxxx (eg
1
2606128 to
5
2606128)
EFILive automatically populates the new DSP tables with factory maps during the
upgrade to get you started. On modified engines these may not be suitable
settings, you may need to copy your own tables in to the new DSP section(s).
Once you have made the necessary changes to your individual tunes, save the
modified tune file, and perform a Full Flash of the ECM using V8 Scan and Tune
software.
NOTE: DSP
5
tunes cannot be read out of the ECM once flashed in.
Wiring the DSP
5
Switch
The DSP
5
switch works by selecting different voltages for the ECM to measure,
from these voltages the ECM can determine which program you wish to run.
Below is the suggested resistance to be used for any DSP
5
switch you may wish
to design. Also shown is the approx. voltage the ECM will measure for each
resistance. The switching voltages are configurable within EFILive, however, the
values below give a good even separation of switch points.
The 0.1uF capacitor shown in red is optional, it is used to reduce switch bounce.
