How to Install the Redarc Tow Pro Liberty in a 2007 GMC Sierra 1500

Updated 01/31/2026 | Published 01/27/2026

Products Featured in This Question

Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers

(422)

$27.00

Redarc Plug-and-Play Wiring Harness for Tow-Pro Trailer Brake Controllers

(171)

$27.00

Redarc Tow-Pro Liberty Brake Controller - Dash Knob - Up to 2 Axles - Proportional

(2578)

$190.00

Question:

Redarc lists TPH-025 as harness for 2007 new body GMC Sierra 1500 but I cant find that thing anywhere. Not even their site. I see you have the TPH-010 that fits a large variety of GMC vehicles. Will this one just plug into my 07s brake controller harness? Or will i have to go with a universal? Thank you,

asked by: John W

Expert Reply:

Hey John. There's no plug in brake controller adapter for the 2007 GMC Sierra 1500. What GM did was run the wires you'll need to install a brake controller under your dash but there's no connector on the end of them.

To install the Redarc Tow-Pro Liberty Brake Controller item # RED24FR, you'll need the Universal Wiring Harness item # RED69FR. This harness will allow you to splice directly into the factory wires. The Redarc Plug-and-Play Wiring Harness item # 331-TPH-010, you referenced, fits the 2014 - 2018 Sierra 1500s.

The wiring harness you're looking for is located under the dash, between the steering column and the top of the e-brake pedal, the harness will have a white tag on it, which makes it easier to locate. I've attach a photo below to help you find it.

What kind of trailer do you have?

expert reply by: Jerred H

RED69FR
(click to enlarge)

John W.

1/29/2026

Thanks Jerred. That's the answer i thought was coming. I'm just planning ahead and have a redraw controller in my 4Runner so thought I may go with another for my old truck. Thank you, Regards, John W

Jerred H.

1/31/2026

@JohnW You're welcome! Glad I was able to confirm that for you. Let me know if you have any additional questions down the road!

Tom K.

1/30/2026

I went with a harness for my Express 2500 22 model year. The Redarc unit was a simple install. About 2 hours only because my van didn’t have a trailer package from factory. I had to run wires to battery add on fuse box. The system works great.