Brake Controller Installation on 2008 Chevy Trailblazer

Updated 06/10/2020 | Published 04/25/2015

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Replacement Brake Control Plug-In Harness for Tekonsha and Draw-Tite Brake Controller 12" Long

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Question:

i have a Chevy trailblazer 08 it has the wiring all ready run from factory do i still need to have the 9506p breaker to hook it all up or can i just hook to the wiers all ready there if you can let me know thank you

asked by: Jeff W

Helpful Expert Reply:

The orange wire found under the dash that would provide power to the brake controller is already circuit protected, so you would not need an additional circuit breaker like the # 9506P you referred to.

The wiring connections would be made as follows:

Orange tow pkg wire connects to black wire on controller
Dark blue tow pkg wire connects to blue wire on controller
Light blue tow pkg wire connects to the red controller wire
Black tow pkg wire connects to the white brake controller wire

The Tekonsha PowerTrac # 39523 brake controller would need a quick connect pigtail like part # 20127 to connect to the tow package wiring.

I've linked you to a video that will walk you through the installation on a GMC Envoy, which was GMC's version of your Trailblazer.

expert reply by: Mike L

Craig A.

6/6/2020

i just purchased a camper and wish to install a brake control system in my 08 trail blazer. It came factory with a straight 4 plug and I use a 4 to 7 blade adapter. Can i wire this system in line with the straight 4 it came with or do I also need to install the 7 blade kit on my trail blazer?

Chris R.

6/10/2020

If you already have a 4-Way to 7-Way adapter for the Blazer, you could just add the Wiring Kit # 5506. This kit includes the extra wiring and breakers needed to activate the brake output circuit on the 7-Way and a power line to the brake controller.