39 reviews

2017-2020 Duramax L5P PRO DIESEL Performance Module

Diesel Pro Modules

Fits Chevy/GMC Duramax 6.6L L5P (2017-2020)
  • 2500HD & 3500

Horsepower Select Knob:

*30 HP - Heavy Tow
*60 HP - Best Mileage and Tow
*90 HP - Mileage and Light Tow


  • Simple Install: EZ Plug-n-Play technology that you can install "in minutes" by simply connecting to your engine's wire-harness with factory style connectors.
  • Fuel Mileage: 10-20% improvement (get up to 100 more miles per tank of fuel)
  • Power Increase: Safe/Smooth low to medium range power for daily driving and pulling loads (Max 100 ft/lbs Torque)
  • Throttle Response: No more turbo lag... quicker Get Up & Go
  • Engine Safe: Performance gains stay within Stock parameters
  • Transmission Safe: Engineered for working-class daily drivers
  • Proven: Installed in tens of thousands of diesels since 2003
  • No Additional Mods: No need to delete emissions or add additional mods
  • Warranty Friendly: Leaves no "fingerprint" in the factory computer

Don't be frustrated with your mileage... improve it!

Since 2003 we here at Diesel Domination Inc have focused solely on upgrading "Working-Class Daily Drivers". We truly believe the "original" Dr. Performance Pro Diesel Modules are the Safest, most Warranty Friendly diesel performance products on the market.

The Pro Performance Module is the proven SAFE and WARRANTY FRIENDLY way to increase your dieselu2019s fuel economy and towing ability without the hype, hazards, and hidden costs associated with most diesel chips and delete kits.

Tenu2019s of thousands of hard-working 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 Pro Performance Module.

So effective is the Pro Performance Module at giving you both optimal fuel mileage and power gains, that it makes other diesel performance products nearly obsolete.

The Pro Performance Module was specifically developed for the diesel truck owner who is frustrated with their fuel mileage, but donu2019t 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 mileageu2026 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)


You feel like your truck has plenty of power but the fact is Emission Standards have forced manufacturers to de-tune your truck below 2000 RPM. This de-tuning has caused diesels to lose mileage over the years.

To restore your truck's fuel mileage, you must change the "peak efficiency" of the motor to match your driving/towing RPM speed. Increase the low-end torque rise of your motor 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 their trucks that were once getting 13-16 MPG and are now seeing up to 18-23 MPG.


The main difference between the Pro Performance Module and most electronic diesel performance products is the manipulation of fuel pressure vs fuel volume. Most chips/programmers change injector pulse width which adds for fuel to the engine... the Module changes fuel pressure which enhances the injector plume and increases the fuel atomization.

Excessive injector pulse width modification adds too much fuel volume and can cause the engine to run rich (smoke/heat)... whereas pressure/plume modification causes the engine to run more efficient due to improved fuel atomization. Pressure modification does add slightly more fuel under throttle but the additional combustion performance offsets any negatives.

The Number One reason customers install the Performance Module is for fuel savings but having up to an additional 90 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 Pro Performance Module is an easy to install u201cplug and playu201d diesel performance product suitable for todayu2019s hi-tech diesel engines. Engineered with advanced digital-microprocessor technology, the Module simply plugs into your factory wire-harness with OEM style plugs and helps manages your engineu2019s fuel delivery with precise electronic control of injection pressure.

Pro Performance Module gives you proven results with the u201cbest of both worldsu201d. 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 Pro Performance Module 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... You must change your diesel's "peak efficiency" to increase your fuel mileage.

Add the Pro Performance Module to your Cart "RIGHT NOW" and start experiencing for yourself what thousands of hard-working Powerstroke, Cummins, and Duramax diesel owners are already enjoying.


Customer Reviews
4.6 Based on 39 Reviews
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Filter Reviews:
United States United States
I recommend this product
Duramax L5P Pro Performance Module

Module performed exactly as advertised. 10 minute install. No more Lo-RPM throttle lag and MPG has increased from 9.2 average (over first 36000mi) to 16.7 MPG over last 1000 mi.

Greg B.
United States United States
I recommend this product
Greg Bell

Great product gained 2-3 mph pulling my 45’ trailer

United States United States
2020 L5P Pro Diesel Performance Module

Works great. Easy to install.

Jeffrey G.
United States United States
LP5 upgrade

Quick Delivery and very easy install. Big difference in performance. Haven't towed with it yet but daily driving has made a big difference and better fuel milage.

Timothy O.
United States United States
Pulsar and Cts3

Absolutely love it!

United States United States
2020 Duramax

at first there was a improvement in response and fuel mileage... but now there is some slight miss at speed and the mileage has gone back to almost the original mileage

Robert D.
United States United States
Great product

This unit did exactly what I was looking for. I mainly want to decrease the turbo lag I had. It did that and increased my daily commute gas by 3 miles per gallon

Thomas B.
United States United States
gmc 3500

works great easy to install....

United States United States
Highly recommended!

You can definitely feel the difference, watching the increase in mpg’s is also quite fun... easy plug and play, highly recommended!!!

Jerry B.
United States United States
Misleading sales rep

The main reason I purchased a performance module was to correct the tire size for my Duramax. I specifically asked the sales rep, if the Pro Diesel module provided this function, and the answer was a resounding "Yes". I asked again to be absolutely sure. and was told the module could be programed for wheel diameter. Well, it doesn't.The sales rep lied to me, in order to make a sale. This is now sitting a box. Total waste of $600.00. I also complained to Ripoff report. I wouldn't recommend this company to anyone. Buy from knowledgeable name brand companies that provide honest info.