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Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 03-21-2017, 02:55 PM   #11 (permalink)
drbird123
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Diesel ECM Harness

Here is the Diesel ECM Harness drawing. So I was going to use the following pins below.

Gas pin 16 Fuel Level Sensor Signal Primary
Diesel pin 58 Primary Fuel Level Sensor Signal

Gas pin 24 Fuel Tank Pressure Sensor Signal
Diesel Not sure which one to use or if it is needed at all.

Gas pin 31 Low Reference
Diesel There are a bunch of Low Reference so I will see which one goes to harness.

Gas pin 33 5 Volt Reference 1
Diesel There are a bunch of Low Reference so I will see which one goes to harness.

Gas pin 51 Fuel Pump Relay Control Secondary
Diesel Not really sure but was thinking of using the pin 54 DEF Smart Pump Supply Voltage??

Gas pin 57 Vehicle Speed Signal
Diesel pin 52 Vehicle Speed Sensor Signal

Gas pin 61 EVAP Canister Vent Solenoid
Diesel Not to sure what to use?

Gas pin 70 Secondary Fuel Level Sensor Signal
Diesel Not to sure what to use?

Any help would be greatly appreciated!!!

Attached Files
File Type: pdf Diesel.pdf (145.8 KB, 39 views)
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Old 03-21-2017, 03:39 PM   #12 (permalink)
davester
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The "secondary" fuel level sensor/relay pins would be for the cab&chassis models that have two fuel tanks (diesels also have this possibility, not sure how the setup works for them, gas model pumps fuel from rear tank to front tank when the levels are a little different).

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Old 03-21-2017, 05:03 PM   #13 (permalink)
ColoradoTJ
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Awesome conversion.

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Old 03-21-2017, 06:55 PM   #14 (permalink)
drbird123
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Ok I thought this connector would only go to X1, but some wires go to X1 some go to X2 and some go to X3. So this is what I am thinking for wiring so far but I am still not sure about a couple of them. Any help would be great!!

Gas pin 16 Fuel Level Sensor Signal Primary
Diesel pin 58 Primary Fuel Level Sensor Signal X1

Gas pin 24 Fuel Tank Pressure Sensor Signal
Diesel pin 44 Fuel Filter Pressure Switch Signal, Not sure if I can use this???

Gas pin 31 Low Reference
Diesel pin 44 Low Reference on X1

Gas pin 33 5 Volt Reference 1
Diesel pin 43 5 Volt Reference 1 on X1

Gas pin 51 Fuel Pump Relay Control Secondary
Diesel Still not sure about this one??

Gas pin 57 Vehicle Speed Signal
Diesel pin 27 Vehicle Speed Signal on X2

Gas pin 61 EVAP Canister Vent Solenoid
Diesel Not to sure what to use?

Gas pin 70 Secondary Fuel Level Sensor Signal
Diesel pin 3 Secondary Fuel Level Sensor Signal on X3
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Old 03-21-2017, 07:18 PM   #15 (permalink)
drbird123
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X2 & X3 Drawings

Here are the X1, X2 & X3 drawings. The ones that go down to the connector from X1, X2 & X3 are highlighted.
Attached Files
File Type: pdf Diesel X1.pdf (2.20 MB, 33 views)
File Type: pdf Diesel X2.pdf (1.71 MB, 18 views)
File Type: pdf Diesel X3.pdf (2.25 MB, 18 views)
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Old 03-23-2017, 02:11 PM   #16 (permalink)
TruckLover63
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That ought to be a spectacular ride after you are done. If they made a 2500 Suburban w/ Dmax I would have bought one instead of my 2017 pickup!
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Old 03-29-2017, 07:18 AM   #17 (permalink)
vtsquid
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Jumping on board this thread.Congrats on having the ambition to take on this conversion.Please keep us posted.
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Old 04-05-2017, 08:49 PM   #18 (permalink)
drbird123
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Ok she is all back together!!! Just need to figure out the wiring changes and I can start her up!! Does anyone know or have a list of wires that need to be re-pinned at the fusebox?
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Old 04-11-2017, 10:27 PM   #19 (permalink)
GL1800
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subscribed!
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Old 04-14-2017, 11:39 AM   #20 (permalink)
RickDLance
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I just bought an older one the other day and Love it!! You will too I'm sure!

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