2012 Gmc Sierra Trailer Wiring Diagram. This video will show you How to Access the Complete GMC Sierra Wiring Diagrams and details of the wiring harness. I seen one years ago that went in between the harness that services the tail lights and the main one running from the front.
Try it and if that doesn't work write to General Motors and ask them to send you one. GMC Envoy Denali trailer towing package problem. Every used car for sale comes with a free CARFAX Report.
This is what the hitch looks once it's installed on the vehicle.
The Sierra is a full-size pickup truck which is the successor of GM?s long-running Chevrolet C/K line.
Guaranteed Genuine GMC Trailer Wiring Adapter. Next, we'll go ahead and give you some measurements that will help you out in selecting some accessories such as a ball mount, a bicycle rack. Does anyone know if GM (I have stopped by a dealership and they could not tell me) or someone else makes a plug-in harness that will serve the purpose?