How to Get 12 Volt Power For Installation of a Prodigy Brake Controller on a 2011 GMC Yukon Denali

Updated 02/16/2012 | Published 02/13/2012

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Zinc Plated Hex Flange Nut - M8

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Zinc Plated Hex Flange Nut - M6

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Question:

2011 GMC Denali.wired Prodigy unit to 4 wires under dash but there is no power to unit. Is there a fuse or relay that I need to add in fusebox. Car is new,no fuses blown. How do I get power to prodigy? I've been to GMC and a hitch retailer with no answers.

asked by: Tom L

Expert Reply:

The wiring to power the brake controller on your 2011 GMC Yukon Denali is under the hood on the driver side next to the fender well. Remove the cover for the power distribution box and you will find the wire taped to a harness between the fender well and power distribution box. We have an FAQ article that details this, see link, and I added a photo that I took of the wire locations on a GM pickup.

You may also have to connect the 12 volt power wire for your 7-Way trailer connector. Our article details where this wire is and where to connect it also. The attached photo shows this wire location too.

To attach these wires you will need one M6 x 1.0 nut, # 185916, and one M8 x 1.25 nut, # 185917, to secure these wires to the appropriate power stud at the front of the power distribution box.

There is a possibility that you will need to install a 30 amp fuse for the brake controller and a 40 amp fuse for the 12 volt power supply at the locations closest to the power studs in the power distribution box. For the 2011 model these are the larger square type fuses and are available at a local auto parts store. The legend under the lid of the box details where these fuses go, and I attached a photo showing their location for you also.

expert reply by: Robert G