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Chevy/GMC Duramax 07.5 -10 LMM Discussion of Chevy and GMC Trucks with LMM Duramax Turbo Diesel Engines

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I have a stock 2009 crew 4x4 with the addition of 265 tires. I just bought a ECM to have reprogramed for better mileage and power, who should I send it to? 55,000 miles. Thanks Coop45... JOIN NOW TO REMOVE TRACER

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  #1  
Old 07-06-2013, 02:17 PM
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Default New ECM who do I send it to?

I have a stock 2009 crew 4x4 with the addition of 265 tires.
I just bought a ECM to have reprogramed for better mileage and power, who should I send it to?
55,000 miles.
Thanks
Coop45
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  #2  
Old 07-06-2013, 02:53 PM
Diesel Bomber

   

Default

here are a few

www.atptrucks.com

Fleece Performance

Home page

https://syntheticmotorsports.com/ind...=15&chapter=10

2004LB7's Sig:2008 LMM Duramax 3500HD Dually
EFI Live, DPF fell off
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  #3  
Old 07-14-2013, 02:31 PM
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Ok, guys, just put in the duramileage CPM, and as of right now, I am impressed!
The low end power is smooth and strong! The off idle is much more responsive.
Mileage from the DICS before was 19-20 on the freeway flat ground for 30 miles.
Same exact route yesterday was 24-28! Mpg.
This was at 70mph rpm was about 17-1800.
The truck feels like it is coasting down the freeway at 70mph?
Truck runs much smoother? I like it very much so far.
Heading to flaming gorge towing my travel trailer and atv trailer, loaded!
I will give you all the hand calculated numbers when I get back.
But as of right now, the fuel needle is not moving as fast to the empty side!
And I like that!
Coop45
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  #4  
Old 07-14-2013, 05:18 PM
Diesel Bomber

   

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that is great.

please get us the hand calc MPG as the DIC will be more off when the fuel maps get tuned and usually error high.
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  #5  
Old 07-14-2013, 05:28 PM
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Originally Posted by 2004LB7 View Post
that is great.

please get us the hand calc MPG as the DIC will be more off when the fuel maps get tuned and usually error high.
Why would the DIC be off anymore?
The fuel needle is slowed down then also!! hehe!
Coop45
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  #6  
Old 07-27-2013, 04:32 PM
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Ok, just got back from my trip to Flaming Gorge!
Last year 8.0mpg. This year, with much more power! 9.8mpg, DIC said 10.0.
So far around town and back and forth to work 30 miles freeway, and 8 miles city driving per day and one week average = before 17.0 to 17.5mpg average per week, and now 21.0 to 22.0 mpg average per week!.
So I would say for the amount of power and drivability and fuel mileage savings, it was well worth it, I won't be going back to the stock ECM.

Coop45
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  #7  
Old 11-14-2013, 09:01 AM
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Thanks for that input Coop45. Good to know

---AutoMerged DoublePost---

Hey Coop45,
Do you have any other mods besides the duramilage tuned ECM? Where did you get your extra ECM?
DB

dbflyrod's Sig:FOR SALE- 02 Dodge 2500 QC HO 6spd, 4" T-back MBRP, Pac Brake, Airdog 150, front low lockout, active tranny cooler.
08 Chevy, LTZ Z71 2500HD CCLB Dmax, Allison, 4" diamond eye down pipe back w/stock muffler, Efilive V2 Idoho Rob tuned DSP5, Airdog FP150, 60 Gal aux tank w/xfer pump by used Dodge lift pump..got a few of em'. A pillar EGT, boost and Lift pump pressure by Westach.

Last edited by dbflyrod; 11-14-2013 at 09:01 AM.. Reason: Automerged Doublepost
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