Parts Needed to Install a Voyager Trailer Brake Controller on a 2011 GMC Sierra

Question:

I want to install the Voyager unit in a 2011 GMC. What is the part # for the adapter to plug into the factory harness?

asked by: Tommy I

Expert Reply:

On a 2011 GMC Sierra, there is no port under the dash to plug in a wiring harness but there are tow package wires. You will find the wires under the dash and below the steering column held together with a white tag. The tag will list the functions of the wires.

You will need to attach these wires to the 4 wires on the brake controller but they will not match color for color. The brake controller white wire is the ground, black is 12 volt power, blue is out to the trailer brakes, and red is in from the brake switch.

On the Voyager # 39510, you can either cut off the plug on it and use the wires, or you can use # 20127 to plug into the back of the controller and get more length to make the connections under the dash like in the video I have linked for you.

There may also be some connections that need to be made under the hood to make the towing package wiring fully functional. I have included a link to an FAQ article that should help.

expert reply by: Michael H