Amplify your 2017+ Duramax L5P's performance with HP Tuners Tuning from Tuner Depot. Discover the edge that expert tuning can bring to your ride.
* YOU DO NOT NEED THE TDN APP, FOLLOW THE INSTRUCTIONS BELOW*. *Start with all emissions installed and functioning without codes or error messages. Be sure the DEF level is not low. On 17-19 model years you must make sure the soot levels are below 7
* YOU DO NOT NEED THE TDN APP, FOLLOW THE INSTRUCTIONS BELOW*. *Start with all emissions installed and functioning without codes or error messages. Be sure the DEF level is not low. On 17-19 model years you must make sure the soot levels are below 7
We have all of these items bundled HERE. If you purchased a new unlocked ECM click here for the guide. If you purchased the E41 unlock tool to unlock your factory ECM click here for the guide. Once you have the parts you will need to install the LATE
Follow these instructions to perform an ECM or TCM swap. This will copy critical data over from the stock TCM to the new one, it will not change the software or segment versions on the new TCM. We will be referring to the TCM here but you will follow
The L5P CAN plugs are used to keep the CAN network functional after removing the emissions equipment. These CAN plugs use very thin terminals to match the factory harness and require extreme care to be taken when installing them. Any time the CAN pl