Product Details: Equip your semi to be Ready for the Road Ahead™, with the Haldex PLC Select 1M Electronic Control Unit, a crucial device that provides enhanced brake control in demanding or slick operating conditions. This replacement component directly connects to the wheels, allowing it to determine when to release brake pressure to prevent brake sliding or lockup. Engineered with an advanced microprocessor to identify optimal brake release times and repair needs. FleetPride is your First Click in Heavy Duty®.