









🔗 Stay connected, stay ahead—tow smarter with CURT’s ultimate wiring extension!
The CURT 56070 is a 7-foot 7-pin trailer wiring harness extension designed for select Chevrolet, Dodge, Ford, GMC, Nissan, Ram, and Toyota trucks. It provides a plug-and-play solution to add an additional 7-way RV blade socket in the truck bed while retaining the original rear socket. Constructed with durable molded plastic and a spring-loaded dust cover, it ensures reliable, weather-resistant connections without any wire cutting or splicing. Perfect for 5th wheel and gooseneck trailer owners seeking flexible, heavy-duty towing electrical solutions.










| ASIN | B0031GHBSE |
| Best Sellers Rank | #18,886 in Automotive ( See Top 100 in Automotive ) #58 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | CURT |
| Connector Type | 7-way Rv Blade |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,450) |
| Date First Available | October 10, 2007 |
| Global Trade Identification Number | 00612314560707 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.2 pounds |
| Item dimensions L x W x H | 8.7 x 8.2 x 4.1 inches |
| Item model number | 56070 |
| Manufacturer | CURT |
| Manufacturer Part Number | 56070 |
| Material | Plastic |
| Model | Wiring Extension |
| OEM Part Number | 56070 |
| Product Dimensions | 8.7 x 8.2 x 4.1 inches |
| UPC | 612314560707 |
| Wattage | 3 |
M**H
Great product to not cut and splice leaving original
Easy plug and play hook up on old harness making both plugs function without cutting and splicin ! Quick install as well as easy ! Works as it should. Length is perfect to run down to old plug adapt off it and run into bed for a gooseneck hook up where I wanted it .
R**.
Quick and easy install
Very easy DIY plug and play installation and works great. Whole time spent on installing was about 30mins start to finish.
P**R
Easy mounting.
This is the way to go if you need to replace your seven pin RV whip. Fit flawlessly in the bed of my truck and easily plugged into my existing one on my 2019 F350. Would recommend.
G**.
Good Product
Works great. Plenty of length and high quality. Recommend.
S**R
Worked well and made it EZ.
Made the job go easy! Quality looked great.
R**L
Good wiring harness. Packaging and install kit need improvement.
The wiring harness seems like a good product, but the installation kit needs improvement. It's a simple install and shouldn't take you long to complete. I installed the product last night. I watched some installation videos, which made the instructions easier to follow. You will need a drill and a 2 1/8" hole saw. One of the connectors didn't quite fit into the back of my factory 7-plug receptacle. It snapped together after using a razor blade to shave about 1 mm from the fastening clip. This may have been an issue with my factory plug, however. There was a rubber o-ring and quite a bit of dielectric grease in the old plug, which may have prevented the connectors from fully mating. The factory box was not taped closed and was missing the four self-tapping screws, so I had to make a run to the hardware store. The box was lightly damaged. My assumption is that the box was dropped at some point and the screws didn't make it back in the box. They weren't in the Amazon packaging, so they must have disappeared before shipping. Other reviews suggest the provided screws are too short for spray-in lined beds, so they may have been useless to me anyway. I also had trouble with the zip ties. It was 40 degrees Fahrenheit during installation, so the plastic zip ties were brittle. The little tab inside the zipper broke on all five ties that I tried. I ended up using Harbor Freight ties instead. I was surprised to find that they were better than the Curt-supplied ties. In my opinion, the factory zip-ties should be substantial enough to hold up to low and high temperatures. This is a product for pickup trucks, after all. Anyway, I'd recommend the product as long as you're willing to supplement the mounting hardware.
C**D
Great product would recommend buying
Very easy to install and seems well built! All the light and blinkers worked so it does what it’s supposed too! Seems like a solid product, would for sure recommend!
T**B
Perfect fit on my 2024 Ram 2500
This took me about 30 min to install. Plugs matched up just fine. Install did go easy once lowering the spare tire.
B**R
This is MUCH better than having to splice wires together. Relatively quick and easy. Took me about an hour. Someone more mechanically inclined could probably get this done in 1/2 that time. The only difficult part was drilling that big hole in the side of my truck. I think that hurt my feelings more than anything. But other than that, you just slide the wire harness down through the hole, find a route to the bumper connector, unplug it, plug this in, zip-tie it up and it's done. It was a lot simpler than I anticipated. On my 2020 Ram 2500 I lowered the spare tire just to have more room to move, and see clearly, but that may not be necessary on all trucks. Anyway, if you don't want your fifth wheel cable dangling outside the truck while you drive potentially scratching cup your tailgate, or worse, getting caught up in something, I highly recommend this Curt Extension. Everything you need (except the drill) is in the box!
C**Y
good quality wiring and connections. Used for truck cap wiring to prevent cutting into the main wiring harness. exactly as advertised and showed up on time
A**N
Mounts easy. Worked well.
B**N
fantastic upgrade for a guy who spends a lot of time camping and hates having the trailer cord over the tailgate. make sure you have clearance behind for it, I installed it just over my wheel well for easy access and now I can load wood and other camping stuff behind my 5th wheel hitch after hooking up
T**R
Installed this in my 2010 Tundra and it connected to the factory harness perfectly. It was difficult to find a good spot near the back of the box to install the connector, but that is a fault of the truck box design and my choice of placement and not the product.
Trustpilot
2 days ago
4 days ago