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Hooking up your 5th wheel or gooseneck trailer has never been easier with the RV-style, 7-way blade connector mounted right in your truck bed. This setup ensures a hassle-free hookup, keeping all your trailer’s electrical components seamlessly connected, so you can confidently get on the road without any fuss.
Install in no time without the need for drilling or splicing, thanks to the custom-fit wiring harness. It comes with a cover plate that perfectly adapts to the factory GM truck bed connector. Your truck bed will maintain a clean, factory look while providing you with reliable trailer connectivity.
With a generous 7-foot insulated harness, this wiring kit stretches from your truck’s rear bumper to the bed, offering great flexibility for various vehicle configurations. Whether your rig is equipped with a factory tow package or not, this wiring solution ensures seamless connectivity without the hassle of modifications.
Keep your connectors clean and functional regardless of the weather with the spring-loaded dust cover. It ensures that dirt, debris, and moisture are kept out, delivering reliable protection and ensuring that your connection remains secure and operational, trip after trip.
From tail lights to brake and reverse signals, this 7-way connection covers all your lighting needs. It includes auxiliary power, ensuring all your trailer’s systems are powered, providing you with enhanced safety and reliability when navigating the roads.
Keep your wiring neat and safeguarded with the included slit loom and zip ties. They help in organizing the wires and provide protection against wear and tear. This ensures long-term reliability and a tidy setup that’s easy to manage and maintain.
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Great price, same as factory equipment, comes with adaptor plate to match factory filler plate. Installed on my 2024 Silverado 2500
Product was a great factory fit for my 2022 GMC 2500hd. Install was straightforward. A little dielectric grease on the connections and zip ties to hold up the extra length and we were all set. The toughest part was trying to get the spare tire down to get more working room as the key fitting for the tire was corroded and had to use spray to loosen it up!
Works great,took about an hour to install. The video is right, spare tire removal would have made it easier.
Brooke M.
4/27/2025
Thanks for sharing your personal experience -- nice to know what is really necessary :)
Put this harness in in preparation for a fifth wheel. The only way this install would have been easier is if I had my son in law do it. Very easy install.
Plug and play, worked as advertised, the cover plate works better than having the never needed 4 prong plug, should make them available at local distributors.
I already had a wye in my wiring harness with a wire that was meant to have a plug attached, I simply unplugged the factory wire and added this new harness, no need to disconnect the bumper plug.
GMC spent more money than I did supplying the harness and dummy socket, they should have just installed the working socket…oh well.
Good idea to use the grease to prevent corrosion.
One year review - This harness has lived up to my expectations. You know it's quality-built when you don't need to think about it. When I hook up my fifth wheel to the truck, it simply works...every time. What else can I say? If you need this harness, you won't be disappointed.
Simple Plug and Play installation. It really cant get any easier than this.
Quality parts as good as OEM
Plug and play easy to install! The instructions included in the box and the YouTube video were very helpful. The hardest part was finding a place to zip tie the excess wiring. Took about an hour to install. Very pleased!
Excellent quality, fast delivery, video installation instructions, which made the installation much easier
Was able to mount the receptacle forward of the wheel well by fishing over the wheel well.Can now connect my Lance slide in pick up camper direct. Works slick and quality product.
Used to to wire in my FourWheel Hawk camper on my new 2024 Chevrolet 2500hd, very easy to use and eliminates running wire from camper to truck battery. Since I converted my 12 volt batteries in camper to lithium, I do not tie them into truck battery.
Jerry 
6/7/2025
Has been working for a year with no problems, use it to run the camper clearance and running lights. Also use the 12 volt supply to run refrigerator when traveling, plug it into lithium batteries when camping.
I added this wiring harness to the inside of my truck bed and couldn’t be happier. I have a fifth wheel RV so this addition kept me from having to run the RV’s cable over the tailgate.
Good instructions,
easy install,
works like a charm.
I really liked that eTrailer has do it yourself help videos for most of their products.
VERY helpful.
Perfect quick connect light cord
While delivery didn't go as expected (through no fault of etrailer)installation was a breeze thanks to video help from etrailer. It took maybe 1/2 hour to install. I've never had a bad experience buying from etrailer
Awesome product great instructions and easy to install!!
Works as advertised the installation was easy would buy again for other vehicles
Good quality and easy to install on my 2025 Chevrolet 2500HD. Took about 20 minutes to install.
Went together very simple and easy plugged it in and works
Doug
3/6/2025
Working good
Thank you very much for your gooseneck wiring, it fit beautifully. You guys need to call GMC and get ahold engineer and tell them what you're doing because they seem not to know anything about this wiring even the GMC dealership in Kalamazoo MI. Thank you.
Ordered this for a 2024 Silverado 2500HD even though it wasnt certain that it would be compatible. Once i figured the connections out the actual install took maybe 15 minutes! Ill add i coated all the connection pins with dielectric grease before reconnection. Worked perfectly.
Shipping was fast, the etrailer video help give me the confidence to install myself. But to be honest the extension is well made and self explanatory to install. Works prefect.
Super easy to install, and works perfec t.
I took no more than an hour to completely install. The under the bed wiring was exactly as it needed to be to join in the wiring. It looks factory installed.
Works well,and easy installation.
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Gwendolyn Y.
3/10/2025
Hey Lucas. Install looks great! What kind of camper are you towing?