Description: This transmission tuning package is specifically designed for 2017 - 2019 GMC vehicles with the L5P 6.6L Duramax engine. TCM Tuning boosts line pressure, putting more force on clutch packs to prevent slippage and early wear on clutch disks. It also adjusts shifting points for better driveability. Features include an HP Tuners Unlocked T87A TCM and an AMDP Transmission Tune. Optional items are an HP Tuners MPVI3 and 4 HP Tuners Tuning Credits. Note that an HP Tuners MPVI3 and 4 Tuning credits are needed to load the transmission tune into the vehicle.

How to use: First, make sure you have an HP Tuners MPVI3 and 4 Tuning credits. Connect the MPVI3 to your vehicle and use the HP Tuners software to load the AMDP Transmission Tune from the unlocked T87A TCM into your vehicle's system. Attention: Always follow the instructions in the HP Tuners software carefully. Don't try to load the tune without the required credits and equipment. Maintenance: Keep your vehicle's transmission fluid at the proper level and change it as recommended by the manufacturer. Check the MPVI3 device regularly for any signs of damage or malfunction.