GDP 2017-2019 6.6L Duramax Custom T87 Transmission Tuning Package HP Tuners Tuning Credits:Add Credits (4) A rigid aluminum bracket along

A rigid aluminum bracket along with vibration isolators allow for versatile and easy installation

By simply turning the dial left or right until it clicks

HP Tuners or other transmission pressure tuning

Speed Demon LED replacement bulbs can fit vehicle daytime running lights (DRL)

Includes (2) 5 inch tall rear blocks

GDP 2017-2019 6.6L Duramax Custom T87 Transmission Tuning Package HP Tuners Tuning Credits:Add Credits (4) A rigid aluminum bracket alongGDP 2017 2019 6. 6L Duramax Custom T87 Transmission Tuning Package Package Includes: HP Tuners MPVI4 (Optional) 4 HP Tuners Tuning Credits (Optional) GDP Transmission Tune Note An HP Tuners MPVI4 & 4 Tuning credits are required to load the transmission tune into the vehicle