All SALES OF THIS PRODUCT ARE FINAL. NO REFUNDS, RETURNS, OR EXCHANGES PERMITTED. 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 TCM no longer requires an upgrade! Users can now simply license and tune their T87A TCM without any upgrade. Normal vehicle licensing still required.
T93 TCM's found on 20-23 Models require unlock service.
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.
