Adding 4-Way Trailer Harness To 2013 GMC Sierra With Factory 7-Way

Question

Question:

My 2013 GMC Serria has a factory plug. What product do I need to put a t behind the bumper to plug in my bar lights. and still have the 7 pin plug working?

asked by: Jim R

0

Expert Reply:

To add a 4-way connector to your Sierra I recommend the Tow Ready T-One Wiring Harness, part # 118384. This plugs into the vehicle wiring under the rear of the truck by the bumper and allows you to retain your 7-way connector while giving you a 4-way as well.

If you wish to change your factory connector to a 7-way and 4-way combined the connector I recommend for your 2013 Sierra is the Hopkins Multi-Tow 7-Way and 4-Way Trailer Connector, part # 30955.

This installs in the factory plug located under the vehicle near the bumper above the spare tire. Simply plug it in and you have a working 4-way connector for the lights and a working 7-way for your trailer.

Another connector that is designed to work with your truck is the Pollak 7- and 4-Pole Trailer Connector Socket, part # HM40975. The design of the doors on this plug will only allow you to be able to use one of the connectors at a time.

expert reply by: Jeffrey L

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Answer 1

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a…

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Answer 2

I've never heard of an actual third brake light connector on a camper shell to plug in on a truck and we don't carry any parts to do that. The light generally needs to be hardwired into the truck's brake light circuit. The…

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Answer 3

If the trailer wheels scrubbed (dragged and scrapped the ground instead of rolling) when jack knifed then it could have thrown something out of alignment or damaged something. First, inspect the suspension. Look for any elongated holes where…

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Answer 4

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 5

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 6

If you are needing the hub and drum assembly then you will want to go with the Dexter Trailer Hub and Drum Assembly #8-201-5UC3-EZ but if you are just looking for an idler hub then you will want part #8-213-5UC1 instead. These come with the correct…

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Answer 7

I would be happy to help you set up your 2022 Toyota Highlander to haul your new travel trailer. The wiring harness you currently have controls your trailer's lighting functions only. You do not need to rewire your Toyota you just need another…

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Answer 8

For your enclosed trailer application I have several suggestions for adding interior lighting that you can control directly via a switch. Since your current 4-pole trailer wiring does NOT include a 12V auxiliary power feed that could power inside…

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Answer 9

The only way you could power interior dome lights on a trailer without it being connected to a tow vehicle would be to power the lights with a battery like a breakaway battery. How you choose to wire up the batteries will in the end be up to you, but…

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Answer 10

From what I could find it looks like your 122R (red) and 122Y (amber) lights measure 3.75" x 1.70" x .81". We don't have any replacement lense directly for the GLO-BRITE lights but we do have some similar lights that you could use…

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Answer 11

Since you have a wheelbase/axle spacing of 38 inches the correct hanger kit for slipper springs would be the part #HAP-105-205-01. And then for a 7k trailer axle the u-bolt kit you'd want would be the part #APUBR-8. I attached the diagram to use…

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Answer 12

If your vehicle has a factory brake controller plug, you can simply use the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers – Ford, Item #3034-P, which will connect to the vehicle plug and the brake controller. On the new E-450…

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Adding 4-Way Trailer Harness To 2013 GMC Sierra With Factory 7-Way

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