Density Speed and Performance - HP Tuners Custom Tuning - 2017-2023 L5P Duramax

Custom Tuning built for your 17-23 L5P Duramax to suit your build, loaded via HP Tuners.

ECU's can be unlocked right from the OBD2 Port! No sending ECU off for unlock service.

*2017 Models and Early 2018 may still require the E41 Upgrade Kit.

TCM Tuning Add-On

Good news—The GM T87A & T93 Global A TCM no longer requires an upgrade! Users can now simply license and tune their T87A TCM without any upgrade. Normal vehicle licensing still required.

Revised shift schedule to improve drive-ability

Improved shift timing

Re-designed torque converter lock-up strategy

Allows power transfer from the engine to the wheels more directly via TCC lock-up

Raised Line Pressure on T87 TCMS only. Not available on T93 TCMS.