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HP Tuners Custom Tuning
2017+ Duramax L5P
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L5P Tuning and selections are now available! We VERY strongly recommend that you purchase TCM Tuning alongside this package.
We currently have limited stock of our HP Tuner modified L5P E41 ECMs. This will cause any orders with this option to be delayed.
L5P Plugs will replace the nox and def module when the exhaust/def is removed from the L5P for racing. They will keep the CAN-BUS alive to the fuel tank and maintain normal ECU operation for fuel tank/lift pump data. These plugs can be utilized or the factory modules left plugged into the harness and zip tied up.
TCM Tuning is STRONGLY recommended by our calibrators to accompany your L5P ECM Tuning.