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Experienced ECM tuning

Whether you're looking to have your electronic control module expertly tuned by our experienced technicians or to replace your current one with one of our custom-designed units, Diesel Doctor can get you the speed and increased fuel economy you need.

Choose the real ECM specialists!

Joe started it all and manages Diesel Doctor to this day. You can always be sure you'll get the right performance tuning and fuel efficiency.

Why choose Diesel Doctor?

Turn your truck up!

Get back on the road faster!

You don't want to spend downtime waiting at a shop! Our Raw Power Performance parts are made right here in the shop and can be installed fast!

Raw Power Performance parts

Can't make it in? No problem!

You don't have to make it to our shop to boost your truck's power and fuel efficiency! Just send in your ECM for fuel savings and speed!

Tuning by mail

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Call now for ECM tuning!


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Diesel Doctor turns up the performance!

With over 12 years of experience custom-tuning diesel engines for increased performance and fuel economy, you can trust the locally owned and family operated ECM experts to boost your output - all work and products are guaranteed as long you own the truck!

Red semi truck Speedometer


We provide FREE diagnostic checks, trip readouts, and fault code readings – whether you're a new customer or regular!

Make your truck more enjoyable to drive

Our power plugs add approximately 100 horsepower and 100 ft lbs of torque! Our boxes are adjustable from 50hp to 200hp and also boast an aux low switch to cut boost and save extreme fuel mileage when the trucks aren't loaded. The top setting on our boxes is thrust, which is ALL OUT!


We can add horsepower torque and increase fuel mileage through programming. Plus, we can adjust any parameters you want to make your truck better.

Diesel Doctor employees

            “New location!

   4700 Broadway

           Beside the Pilot

        Mt.Vernon, Illinois”


Melinda's Hair House

Also featuring a full service CB Shop