2010 GMC Sierra Trailer Wiring | etrailer 2010 GMC Sierra Trailer Wiring. Towing. Trailer Wiring. Filter Results. Combined wiring system - brake and turn signals are sent along the same wire. Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long with factory 7-Way. 300 reviews. Code: C56070. Retail: $118. Our Price: $ 59. You Save Electric Trailer Brake Wiring Schematic | Free Wiring Diagram Dec 06, 2019Assortment of electric trailer brake wiring schematic. A wiring diagram is a streamlined conventional pictorial representation of an electric circuit. It reveals the parts of the circuit as streamlined forms, as well as the power and signal connections in between the gadgets. SERVICE TRAILER BRAKE SYSTEM fix! | Chevy and GMC Duramax Feb 01, 2016BRAKE SYSTEM come up I dropped about 3k$ at 4 different shops telling me there theories ?but I took it to a different GMC dealer in Long beach told them what was replaced and that I had low voltage on the Trailer brake system and all it was is the trailer brake power was landed on the wrong terminal at the main ECU the trailer brake power was Related searches for 2010 gmc trailer brake wiring gmc trailer wiringgmc trailer wiring diagramgmc sierra trailer wiringgmc trailer wiring harnessgmc yukon trailer wiring diagramgmc sierra trailer wiring harness2015 gmc trailer wiring diagramgmc trailer wiring harness diagram