Plug-n-drive HP & Torque matched to your engine

5 stars for throttle response

Driving-zone power

Plug-n-drive fit

Better MPG aim

18 shield check

OEM-style harnesses. Year-and-engine listings you can trust.

2025 L5P install. Results and sensor locations vary.

Under the hood - post ECM

The performance module uses OEM-style connectors; you plug in under the hood. Performance gains are delivered in the driving zone to target usable pulling power and better MPG, without side effects.

18 bolt

Plug-n-drive harness connections

EZ under-hood install with factory-style connectors. No flashing (footprint) on your ECM.

18 sliders

On-the-fly performance levels

Three adjustable power positions for your driving needs.

18 target

Power plus MPG guaranteed

Combustion Efficiency Programming, aimed at throttle response, less turbo lag, and fuel economy in real miles.

Articles

DoItYourselfRV.com link: Improve Diesel Performance & MPG in Trucks and Motorhomes

RV.com link: Diesel Modules Will Improve Performance and Mileage on Your RV or Truck - RV.com

RV module collection

I noticed...

No more dead pedal. More access to what I paid for.

Verified customer

I used to mash the pedal down from a dead stop with the dump trailer and wait. Installed the Duramax module on a Saturday. Now the truck actually moves when I need it, and there are no increased EGT's

Stuart Brooks

S

Verified customer

Commute is 50 miles each way in a 6.7 Cummins. Stock felt sleepy in traffic. The throttle is more responsive now, and the turbo spools up much faster. It did take a little time, but I am up an average of 3mpg. installed for 2 months.

Andre Silva

A

Verified customer

We run an 8.9L in our coach. Last summer, the hills in Pennsylvania were a grind. With the module installed, this season it holds speed without downshifting as much. Husband did the install in an RV park. Best part is, we've picked up just over a mile per gallon. 

Ruth Crawford

R

Stock diesel owners...

Choose dieselmodule.com for trusted, USA-made, diesel performance and mileage improvements, simple, DIY installation, and guaranteed results.

95%

Would recommend

Owners who would send a neighbor to the same listing.

93%

Fit first try

Shoppers who say the harness matched their year and engine.

89%

Simple install

Plug-n-drive under the hood without special tools or a laptop session.

94%

Driving-zone performance

The performance and MPG improvements they came for.

Stock diesel owners...

Choose dieselmodule.com for trusted, USA-made, diesel performance and mileage improvements, simple, DIY installation, and guaranteed results.