The REDARC Tow-Pro TPH-010 wiring harness offers the ability to connect the Tow-Pro( ) Elite or Tow-Pro( ) Classic electric brake controller directly to your GMC, Cadillac or Chevrolet factory towing package connector behind your vehicle dash. The Tow-Pro Wiring Harness is available in multiple configurations to suit a large variety of GMC, Cadillac and Chevrolet models and contains fitting instructions and the loom with compatible connector. Mating harness adaptors are also available allowing the user to install the Tow-Pro( ) using other manufacturers existing custom wiring installations. The Tow-Pro Harness allows you to connect to the Tow-Pro Elite electric brake controller to the vehicle's factory fitted connector with an easy plug and play design. Simply plug one end of the harness to the electric brake controller connector and then plug the other end to the factory fitted connector behind the vehicle dash. These harnesses will also connect to the Tow-Pro Classic with a small modification. The Tow-Pro Classic does not have a mating connector and requires bare wires to be inserted into the brake controller instead.