Installing an Electric Brake Controller on 2007-2013 GM Full-Size Truck or 2007-Present GM SUV

Custom Fit Brake Controller

Technical Bulletin

SUBJECT / Summary: Wiring electric brake controls on 2007-2013 GM full size trucks and 2007-present GM SUVs including Cadillac Escalade, Chevy Silverado (new body) Chevy Suburban, Chevy Tahoe, GMC Sierra (new body) and GMC Yukon.

PROBLEM: General Motors quit offering the plug in type connectors on these vehicles with a factory tow package. These models have four (possibly five) blunt cut wires under the left side of the instrument panel to the left of the steering column. The wires can be identified by a white label and the color of the wires. The wire colors are (1) Red/Black wire, (1) White wire, (1) Light Blue/White wire and (1) Dark Blue wire and possibly (1) Orange wire.

Watch a brake controller installation on a 2010 Chevy Silverado

brake control wires image

Connect the Brake Control as Follows:
GM Wire to Brake Control Wire Function
Red/Black Black Battery Power
White White Ground
Light Blue/White Red Brake Light Signal
Dark Blue Blue Brake Output to Trailer
Orange N/A Center High Mount Stop Lamp (CHMSL)

SOLUTION: There are two wires under the hood that have to be connected to make the tow package functional, one is the power wire to the brake control and the other is the battery charge line to the 7 way connector. These wires are both Red/Black with eyelets on them. They are coiled up under the hood and will need to be connected to the under hood fuse box. One of the wires is located between the under hood fuse box and the left (driver) side fender. The other is located under the master cylinder/brake booster assembly.

fuse box under the hood

The battery charge wire and the power wire to the brake control have different size eyelets on them and will connect to the threaded studs under the Gray handle at the front of the fuse box. The two studs are also different size.

Note: GM does not supply the attaching nut required to secure the wires to the studs. These can be obtained locally. You will need (1) M6 x 1.0 nut and (1) M8 x 1.25 nut.

CAUTION: Raising the Gray handle more than 3/8 of an inch to gain access to the studs may result in the fuse box coming disconnected from the electrical connector. If disconnection occurs you may have to consult your local GM dealership for repairs.

Bulletin Date: 3/27/2009

Bulletin Number: TB0007

Questions and Comments about this article

Jonathan S. 01/10/2020

Can the brake controller be hooked so as not to be supplied power at all times. Maybe through a power supply only used when the key is turned. I have found that over a week it killed the battery in my Tahoe.64161

Reply from Jacob H 01/13/2020

The brake controller itself should not be drawing enough power to drain your battery. With that being said there should be a sleep mode on the brake controller itself so that it will go to sleep after a certain amount of time of not being used. I would check all of your connections to make sure nothing is shorting out and in turn draining the battery.54466

Rusty 01/15/2020

the dark blue wire under the dash that goes to the trailer.... where does the other end come out?64357

Reply from Jason S 01/17/2020

The other end of the blue wire in your Silverado will connect to the 7-way wiring harness. It will be connected to the 5 o'clock pin of your 7-way trailer connection. I've attached an article to help with some diagrams.54569

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