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Duramax Fourth Generation: 2007.5-2010 (LMM) Discuss the fourth generation (2007.5-2010) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 11-16-2011, 12:21 PM   #1 (permalink)
03 busa
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Will ECM swap change oil and fuel %'s

When changing out ecm's will the %'s change on the dic for fuel and oil change??

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Old 11-17-2011, 08:58 AM   #2 (permalink)
unit
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Don't know the answer to that one. Let us know when you find out.

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Old 06-16-2019, 12:20 PM   #3 (permalink)
Jimpa
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I'm new the forums so I'm stiil working on figuring out the threads.

I swapped out my ECM with one called the Duramilager. It was pre-programmed for highway use. It definitely increased my fuel mileage between 60 and 80 mph to include towing 13k up to 75 mph.

At 60 mph, flat ground, I get just over 35 per gallon and towing I was getting 20-25 per gallon. I recently checked it at 80 mph, flat ground and was getting 26 mpg.

I don't know if it still exists but no other mods or programs can be added with that ECM. You'd be better off with EFI Live or something similar that you can tune to your needs.
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2008 LMM 2500HD
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ECM mod to the Duramilager
K&N dry intake
Modified hood for cooler temps
Bumper mounted LED light bar
6 tube 120psi train horn
Fusion controller for monitoring and DPF delete with
straight pipe and baffled muffler
Resonator bypass
PCV bypass
2" torsion key lift and 5th wheel rails.

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Old 06-17-2019, 07:41 PM   #4 (permalink)
Jimpa
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Also, the increased fuel mileage will increase the % life on the fuel filter depending on the quality of the fuel. No idea how to extend oil %
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2008 LMM 2500HD
172k miles
ECM mod to the Duramilager
K&N dry intake
Modified hood for cooler temps
Bumper mounted LED light bar
6 tube 120psi train horn
Fusion controller for monitoring and DPF delete with
straight pipe and baffled muffler
Resonator bypass
PCV bypass
2" torsion key lift and 5th wheel rails.

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Old 06-18-2019, 08:36 AM   #5 (permalink)
Rvn4me
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Michigan Oil Burners Member

Quote:
Originally Posted by 03 busa View Post
When changing out ecm's will the %'s change on the dic for fuel and oil change??
If the ECM you put in was altered in the fuel or oil % tables.
Yes your % will be changed on your DIC. A good tuner will only change fuel % tables to reflect there tunes so it’s more accurate. Otherwise your DIC your mileage will show better MPG than your actually getting.
If your replacement is another OEM GM Part No.:12652526 with stock OS calibration everything will be the same

Is your O.S. 12617103?

Last edited by Rvn4me; 06-18-2019 at 08:55 AM.
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