Will the Curt Replacement OEM USCAR Trailer Connector Fit a 2019 Ram 3500?

Question

Question:

Will this fit a 2019 Ram 3500 CC LB Cummins?

asked by: Damon M

0

Expert Reply:

Yes it will Damon. The Curt Replacement OEM USCAR Trailer Connector item # C42JR will plug into the harness right behind your factory connector. It's a circular called a USCAR.

Are you wanting to use the 7-way and 4-way at the same time?

expert reply by: Jerred H

0

USCAR
(click to enlarge)

Damon M.

8/27/2025

Sounds good. No I won't need to use both plugs at the same time. Thanks

Reply

Jerred H.

8/27/2025

@DamonM You're welcome! That's good. You'd need item # HM75MV if you did. The covers on item # C42JR won't physically open at the same time.

Reply

Answer 1

Yes, the Curt #C42JR will fit in place of the factory Pollak #HM40975 trailer connector on your 2017 Chevrolet Silverado 1500.

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Answer 2

Yes, it will! However, the Curt Replacement OEM USCAR Trailer Connector item #C42JR won't let you use both the 7-Way and the 4-Way at the same time. You will need to install the Multi-Tow 7-Way and 4-Way item #30955 to use both at the same time.…

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Answer 3

Blue Ox has an easy system for determining the weight capacity of your spring bars, whereas other companies may use measurements or printed capacity to assist. With Blue Ox, there is a 5 dimple system: No dimples means it is rated for up to 350 lbs…

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Answer 4

Thanks for the picture! I checked with Progressive Dynamics the replacement power converter you need for your Parallax Series 7300 Model 7345 is the Replacement Converter for Parallax/Magnetek or WFCO RV Power Centers - 45 Amp item #PD4645V.

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Answer 5

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 6

Hey Gregory, thanks for reaching out! I really like the etrailer Trailer Hitch Receiver #e55ZR as well - I know you'll be happy with it! When it comes to wiring, a 4-Way is used for basic trailer lighting, but since you'll be towing a trailer…

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Answer 7

You can use Bearing Buddies such as #BB1980A-SS on your trailer with brakes you just need to make sure you don't overfill them because if grease gets on brake pads the pads will need to be replaced. So as long as you are sure you aren't using…

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Answer 8

You will want to use the Multi-Tow 7-Way and 4-Way #30955 to add a 4-way you can access while also using the 7-way blade connector. The Curt 57015 #C42JR does not allow for both the 7-way and 4-way doors to be opened at the same time. The Multi-Tow…

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Answer 9

Hey Wyatt, yes the Curt 7-way trailer wiring harness part #C42JR does fit to the 7-way wiring harness you have on your 2024 Ford Bronco.

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Answer 10

Hello Todd, I am very sorry the install is not going more smoothly for you on the Redarc #RED52VR, seems like this is an ongoing issue with the Trailblazer and finding the brake wiring. Any chance you are close to Wentzville, MO? We would love to do…

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Answer 11

Thanks for the picture! Yes, it will. The old factory connector on your 2005 GMC Yukon XL Denali will pop out once you disconnect the wiring harness and you'll be able to insert the Curt Replacement OEM USCAR Trailer Connector item #C42JR.

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Will the Curt Replacement OEM USCAR Trailer Connector Fit a 2019 Ram 3500?

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