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Looking for information on standalone harnesses and tuning?
Start with our ordering guide for a walkthrough.

Ordering Guide

WHAT'S DMAX SWAP?

Whether it’s your Dad’s old classic C-10 or a custom street rod
that you have always wanted since you were a kid!
We can help you turn your custom ride into a powerful, reliable
and impressive machine by helping you power it with a Duramax Diesel.

WE'VE GOT TUNES!

We've got your tunes covered for ECMs & TCMs,
providing several options on how to accomplish that for you.
Also check out our custom harnesses!

Shop ECM / TCMs Now!

DURAMAX POWER!

We have the experience and parts you need to
make your duramax powertrain swap integrate flawlessly.

Shop Now!

Ready to Order!?

Looking for information on standalone harnesses and tuning? We have create this intro for you.

Purchasing Guide

Find us on Instagram

dmaxswap

Found this old girl resting in a field in Georgia…think my wife would be mad if I brought it home and put a Duramax in it 🤔

Instagram post 17927388454796215

Doing #DmaxSwap things! 🚀 #2.8Duramax #Airboat

Check out this piece we had done of #kiowa57 by @h

Limited Edition #kiowa57 decals now available at d

#kiowa57 on a little outing with @j_branch_restomo

Updated photos of a customers build 👌 @davemoll

Check out this sick Apache build by one of our cus

Duramax 2.8 turbo diesel airboat project...looking

Trucks and coffee. Thanks for the VIP parking #pbi

Another great day in the books! #kiowa57 #dmaxswap

Check out this super cool 72 K5 blazer built by on

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Tuning Policy

In order to power your project with a Duramax Diesel, it is important to upgrade the drivetrain components to handle the massive power and torque generated. Similarly our wiring harnesses and electrical systems facilitate a clean trouble free install. Potentially the most important piece of the puzzle is a having the proper ECM calibration to not only work with your specific application (trans type, emissions equipment, intake/exhaust) but also with the goals of your vehicle (race, show, tow, marine). This is where our nearly 2 decades of Duramax experience comes in.

Non-emission compliant. Intended for off-highway competition use only. This is not intended for dual use. We do not support late model integrations, only swaps into vehicles prior to 1998. We will not provide tuning in your registered, factory vehicle with any types of deletes or non emissions compliant tuning. For your swaps it's up to you to research the guidelines of your location to ensure compliance for your classic, swapped vehicle

All of our custom ECM and TCM calibrations are created in house using the latest EFILive software and hardware. We can support any power level depending on the supporting mods of your engine from stock to 1000+ HP twin turbo custom built engines.

“Tuning For Life”
If your purchasing your performance upgrade components from us…All of our customers get free tune updates for the life of their custom vehicle ownership. That means if you buy an upgraded turbo or larger injectors from us…we will update your ECM calibration for free!!!

All of our tunes come with 1 free hour of technical support required to ensure you get your engine fired up and help with diagnostic support needed in case your donor engine has mechanical issues.

*All custom Calibrations require a completed tune request form including customer contact information so that we can ensure we get it tailored specifically for your application.

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Ready to Order!?

Looking for information on standalone harnesses and tuning? We have create this intro for you.

Featured Products

LWN (2.8L) Custom Standalone Harness/Solution

Stealth Turbos

Kiowa57 Decals (2)

263XHD Transfer Case

Edge Insight CTS3 Monitor

Membrane – Thermal Insulator & Sound Dampening Material

AirDog II 4G

SuperMax Y-Bridge

Find us on Instagram

dmaxswap

Tuning Policy