Check the listing for details. Trailer Brake Control for 15-19 Silverado Sierra 2500 3500 HD Module 1-4 Axle. Condition: New. Listed at 101.99 USD. Includes Everything Pictured: Brake Control Unit Mounting Hardware and Bracket Vehicle specific Plug and Play Wiring Adapter Fits The Following Vehicles 2015 - 2019 Chevrolet, Silverado 2500 HD, with factory Tow Package 2015 - 2019 Chevrolet, Silverado 3500 HD, with factory Tow Package 2015 - 2019 GMC, Sierra 2500 HD, with factory Tow Package 2015 - 2019 GMC, Sierra 3500 HD, with factory Tow Package The REESE Towpower BRAKE-EVN brake controller offers advanced proportional braking by applying brake pressure to match the vehicles deceleration rate. Proportional braking gets you get smoother stops that traditional time based controls. The boost feature gives the ability to apply more initial braking at the onset of stopping when towing heavier loads.