A CURT Quick Plug brake controller wiring adapter is one of the fastest and easiest ways to plug your brake controller into your vehicle. It requires no cutting or splicing! Just insert the vehicle-specific plug end into the OEM vehicle’s factory brake controller socket. The other end plugs into your CURT trailer brake controller. Quick Plug harnesses are available for a variety of vehicles and are unique for each vehicle application to provide the easiest possible installation. This particular brake controller harness fits certain years of the Cadillac Escalade, Escalade ESV, Escalade EXT, Hummer H2, Chevrolet Silverado and GMC Sierra 1500, 1500HD, 1500 Classic, 1500HD Classic, 2500, 2500HD, 3500, 3500 Classic, Avalanche 1500, 2500, Suburban 1500, 2500, Tahoe, Yukon, Yukon XL 1500 and 2500 (see application info to verify fitment). CURT Quick Plug harnesses are compatible with most CURT