Brake Controller and Wiring for a 2007 GMC Sierra with New Body Style

Expert Reply:

The New Body style does not have a port under the dash for a brake controller. You have a bundle of 5 loose wires under the steering wheel, just off to the left. You will need to splice your brake controller into these wires. I would recommend the Tekonsha P-3 brake controller, , part # 90195, for your vehicle. It is a proportional controller that can be easily moved from one vehicle to the next. It is designed for use with electric and/or electric over hydraulic trailer braking systems. A simple switch on the unit allows you to toggle back and forth between the two systems. Another excellent brake controller is the Valley Odyssey II (TM) Geometric Electric Trailer Brake Controller, part # 32810, which is very easy to use and has all the features of the P-3 controller.

expert reply by: Bob G