EZTuner for 2003-2010 Duramax LB7/LLY/LBZ/LMM
Duramax EZTuner Duramileage Programmer is the proven SAFE and PROVEN way to increase your 2003-2010 Duramax diesel’s fuel economy and towing ability without the hype, hazards, and hidden costs associated with most diesel chips. Fits LB7 LLY LBZ LMM

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Call/Text: 1-800-450-5333

Our #1 Selling Diesel Performance Product
(over 13,000 Duramax customers since 2008)


  • 50ECON - Best for Towing SUPER HEAVY Loads
  • 60ECON - Best for Towing SUPER HEAVY Loads
  • 100POWER - Best for beating Dodges and Fords
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Price: $577.00
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Description Install Instructions

Duramileage EZTuner
fits 2003-2010 Duramax Diesel


  • *FUEL SAVINGS: Up to 10-20% Improvement
    • ='s 100 more miles tank fuel
      • Many customers report 4-7 MPG gains
  • *PROVEN: Over 13,000 Customers with Custom Mileage Tunes!
  • *DRIVE-TRAIN SAFE: Designed for Working-Class Trucks
  • *SUPER E-Z TO INSTALL: Plug into Data Port and press a button
  • *AFFORDABLE: No need for additional expensive air intakes and exhaust mods


(the majority of our tunes were built with EFI Live)

FUEL ECONOMY SAVINGS: Some of our customers have testified to us of mileage gains ranging up to 4-7 MILES PER GALLON running unloaded. If you can increase your mileage you can save money on fuel.

TOWING PERFORMANCE: Some customers have reported up to a 20% mileage increases while towing. Also... having the right horsepower and torque in the "driving zone" of your RPM range makes for a pretty sweet experience when pulling steep grades. Your transmission stays in higher gears which allows for faster hill pulling speeds and better economy.

PROVEN RESULTS: It works!!! After programming thousands of Duramax diesels we can conclude Duramileage tuning works from all the feedback we have received from satisfied customers.

PEACE OF MIND: Our Economy tunes are mild and we have not had much negative feedback on transmission issues or high EGTs beyond safe operating temperatures.

(*Please Note we do NOT advocate the removal of emissions equipment on any vehicle!)

You may feel like your Duramax has plenty of power but the fact is Emission Standards have forced de-tuning of the low-end power curve of your diesel. This de-tuning over the past 10 years has caused diesels to drop from 20-25 MPG down to NEW trucks averaging 14-16 MPG.

The only way to get back the loss in fuel mileage is to increase the low-end power curve of your diesel.


To restore mileage you must change the "peak efficiency" of the motor to match your driving/towing RPM speed. This added low-end torque rise significantly improves fuel economy because the engine now does more work with less effort.

After increasing low-end torque many of our diesel customers tell us they were once getting 13-16 MPG and are now seeing up to 18-23 MPG. Plus they now get over 100 more miles out of every tank of fuel. Imagine how much our customers are saving in fuel costs when they get 100 more miles out of every tank of fuel!


Yes its true… there truly is proven SAFE way to increase your Duramax’s fuel economy and towing ability without the hype, hazards, and hidden costs associated with most diesel chips and delete kits.

The fact is, over 12,000 hard-working Duramax diesel truck owners just like you are now experiencing incredible money saving fuel mileage gains and more towing power because they upgraded their trucks with the easy to install EZTuner Custom Mileage Tunes .

So effective are the EZTuner mileage tunes at giving you both optimal fuel mileage and power gains, that it makes other performance products nearly obsolete with its 30 Day Satisfaction Guarantee.

The EZTuner was specifically developed for the Duramax truck owner who is frustrated with their fuel mileage, but don’t want to void their warranty reprogramming the factory computer or installing expensive delete kits.

The price is affordable for most any budget and easy enough for anyone to install. If you are frustrated with less than optimal fuel mileage… you now have a solution!

If you are daily driving or going cross country, 100 EXTRA miles per tank of fuel adds up fast when it comes to money in your wallet. Stopping less to fuel up makes traveling more enjoyable and more affordable when you are saving $20 for every $100 in fuel. (up to 20% MPG increase)


The main difference between the EZTuner and most diesel performance products is the manipulation of injector fuel volume. Chips/programmers increase injector pulse width which adds for fuel to the engine to increase power... the EZTuner finely tunes the pulse width to bring the engine up to its peak efficiency and keep it there without over-fueling the engine.

Excessive injector pulse width modification adds to much fuel which cause the engines to run rich (smoke/heat)... whereas the EZTuner's finely tuned modifications causes the engine to run more efficient due to improved combustion. These fine tuned modification do add slightly more fuel under throttle but the additional combustion performance offsets any negatives.

The Number One reason customers install the EZTuner is for fuel savings, but having up to an additional 100 horsepower (140 ft/lbs torque) makes for a more responsive truck when towing heavy loads. You can now get heavy loads moving faster and keep them moving faster on steep grades with less downshifting. (faster turbo spool gets you through intersections quicker)

The EZTuner is a diesel performance product suitable for today’s hi-tech diesel engines. You simply plug the EZTuner into the OBD2 data port and follow the screen promps. You mileage tunes are installed in just a few minutes.

EZTuner gives you proven results with the “best of both worlds”. You get incredible money-saving benefits of better fuel economy and an amazing engine performance increase and at the same time! Instead of being frustrated with your diesel, simply upgrade it with a EZTuner and get the fuel mileage increase, and first-class towing power gains you deserve.


You can't just wish for better mileage and do nothing!

Act now and Order a EZTuner for your diesel!

I guarantee you that nowhere else will you find what EZTuner custom mileage tunes can do for you when it comes to both mileage and power improvements.

Add the EZTuner to your Cart "Right Now" and start experiencing for yourself what thousands of hard working Duramax diesel owners are already enjoying.

ORDER NOW… because our Special Discount inventory is Limited!

OR CALL TODAY 1-800-450-5333


Good Afternoon,

I purchased the DuraMileage tuner for my 05 LLY Duramax. After installing an after market tuner made by another brand and running it for approximately 165,000 miles and fighting multiple code issues and damaged sensors, I pulled off the tuner and went without for another 100,000 miles. During this time the truck went to the dealer for an injector harness issue, and of course they flashed the truck ECM with the latest software. After this repair the Duramax just did not get any mileage. It averaged 13-15 MPG, and the power was off quite a bit.

At this time I started looking for an alternative solution but did not want any more devices that manipulated signals to the ECM. This is when I came across your product and noticed that you reprogrammed the ECM. This had me curious enough to purchase the product and the money back guarantee sealed the deal.

Well at the time of install the LLY had 297,000 miles on it and it had the AFE turbo inlet pipe and a KN filter. Currently, I now have 308,000 miles on the LLY. It is driven daily around town and tows moderate loads occasionally.

I now get an average city MPG of 18.7 up from 14.7, and the power increase is very noticeable when taking off from the red lights. The highway mileage at 70 MPH is 25 MPG empty up from 18. Since I do not tow as much as I used to, I cannot tell you what the MPG towing would be, but I suspect it will be improved from the last time I checked.

Most importantly, my wife who keeps the books for the company has noticed through expenses that I do not by as much fuel as before. Bottom line within 3 months the fuel savings paid for your programmer.

Again, thanks for a quality product and delivering what you promised.

Ron & Steve

I would like to say thank you for a great tune (70Econ on EZTuner) on my 2006 Silverado ECM. It's been a while since i had it done but haven't had a chance to really check it out until just lately. I just finished a 1000 mile trip and was very happy with the results. I got in excess of five more miles to a gallon average on my trip, what a surprise. I had been getting four more miles per gallon around town so i was sure hiway miles would be better but it was great. The extra power was just a bonus.

Thanks allot Guys


Ray - California

. . 4.5 of 5 4.5 of 5 Total Reviews: 35

5 of 5 2003 September 12, 2021
Reviewer: Frank from Sacramento, CA United States  
Awesome mileage and low end torque!

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5 of 5 2007 GMC 2500 HD crew cab August 19, 2021
Reviewer: David Kilgore from Hebron, CT United States  
Fuel mileage went from 15 to 20.3 Thank you

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5 of 5 2005 Chevy Silverado 2500HD May 22, 2021
Reviewer: R Shane Marchand from Gonzales, LA United States  
Very pleased with the turner. A very noticeable improvement. Not only has my average mph increase by 2 mpg, it runs better than ever. Smooth acceleration, good power, and just all around more Pleasent to drive.

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5 of 5 2007 GMC Duramax 2500HD. LBZ April 23, 2021
Reviewer: Charles Matlock from Ballwin, MO United States  
Bought this for fuel mileage and I couldn’t be happier. I shop a lot of tuner and I’m happy I got this one. It was a little delayed for some reason but it got here in time to instal the program before our trip

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1 of 5 April 3, 2021
Reviewer: Jack Pawson from Hopewell Junction , NY United States  
You have to be joking! You’re asking me to review this purchase when I’ve been calling you nonstop because I never received my item! I tried every extension and always got your voicemail, I left numerous messages and no one called me back! I even left a message telling you that if I don’t hear back from you by the end of the day, I would file a dispute with my credit card, and still no one called me back. My review is “YOU SUCK”!  Make sure you put that online for your customers to see!

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