Chevy/GMC Duramax 07.5 -10 LMMDiscussion of Chevy and GMC Trucks with LMM Duramax Turbo Diesel Engines
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?
Coop45... JOIN NOW TO REMOVE TRACER
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!
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.
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