Brake Controller Install Harness Recommendation for 2018 GMC Sierra 1500

Question

Question:

Trouble finding 4 port harness plug under dash in new sierra 2018 1500 pickup. Is it in lower junction box or under dash somewhere? Thanks if you can help.

asked by: Fred J

0

Expert Reply:

The brake controller install harness part # 3016 is the correct harness for your 2018 GMC Sierra 1500 for installing the P3 part # 90195. I attached a picture that shows the junction box and port where it needs to install as well.

I attached an install video for this harness on a similar Silverado.

expert reply by: Jameson C

0

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Answer 1

The factory brake controller port on your 2018 Chevy Silverado 1500 is in your vehicle's junction box underneath the dash, to the left of the steering column, just above the carpeting. If you take a look at the accompanying photo you can see…

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Answer 2

Based on my research the issue with installing a factory brake controller on your Silverado (post-factory) has to do with the factory harness and programming on the truck. Chevy's official stance is that it cannot be added after the fact. You…

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Answer 3

The wires to install the Prodigy P3 #90195 are indeed already run and under your dash. I have added a link to an installation video showing exactly how to install this brake controller in a 2011 GMC Sierra like yours. On the Prodigy the blue wire is…

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Answer 4

Yes, there is another option to add a brake controller to your Sierra. Since you have the factory tow package, I recommend the Curt Echo In-Line Wireless Brake Controller item #C79DR. The controller plugs in behind your 7-way with included…

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Answer 5

The blue tab on the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers part #3016 must be pulled out towards you and or removed from the connector in order to remove the harness from your 2018 GMC Sierra 1500. This harness works with GM…

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Answer 6

In order to install the Tekonsha Prodigy P3 Trailer Brake Controller #90195 (great choice!) on your 2018 GMC Sierra 1500 you just need the Plug-In Adapter #3016. One end of the harness plugs right into the brake controller itself and the other end…

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Answer 7

Congratulations on the beautiful new fifth wheel. We do not carry replacement entry doors however you should be able to replace the door with a right hand door but keep in mind you will need to replace the strike insets. To install a window in the…

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Answer 8

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 9

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 10

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 11

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 12

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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