Three automatic torque converter lockup modes that engage based upon turbo boost; Enables Torque Convertor lockup in 2nd gear, 3rd gear or based on vehicle speed; Manual lockup switch that uses safe engine stall protection; Built in 275psi line pressure booster activates over 15psi of turbo boost; Pressure booster increases line pressure 25%-115% leading to increased transmission holding power; Plug in wiring harnesses and OEM sealed connectors; Installs in about an hour PartNumber : bdd1031312 Description : Allison Lock-Up & Pressure Controller Category : Trans Pressure Controls Engine : Duramax 6.6L 11-18 LML-LGH-L5P Make : Chevy/GM Suggested Product : 1061825 Title : BD Allison Lock-up & Pressure Controller - Chevy 2011-2015.5 Duramax 6.6L Programmers & Chips::Transmission Controllers