Difference Between Curt 5th Wheel Base Rail Kits For 2021 GMC Sierra 1500

Question

Question:

Hi, Can you tell me the difference between CURT C45KR and C65KR. Both seems to fit the 2021 Sierra 1500 but with a big $ difference. Thanks

asked by: Stephane B

1

Helpful Expert Reply:

That's a good question, and the only difference between the two base rail kits that fit your 2021 GMC Sierra 1500 (6-1/2 foot and 8 foot bed) is the finish. One is a glossy black finish and the other is a carbide black, which essentially means it just doesn't have quite as much shine to it. Otherwise, they are exactly the same, with the same parts and no-drill install in the frame rails of your truck:

- Gloss Black Finish: Curt Semi-Custom Fifth Wheel Installation Kit for Chevy/GMC Truck # C45KR

- Carbide Black Finish: Curt Semi-Custom Fifth Wheel Installation Kit for Chevy/GMC Truck # C65KR

So you can choose the one that is the least expensive and not lose out on anything in regards to function, performance, or quality.

They will work perfectly to mount a 5th wheel hitch in your '21 Sierra 1500, and I really like the Curt A16 hitches to go with these Curt rails. The right one will depend on if you have a short bed and need a sliding hitch or a long bed and can go with a fixed hitch.

- Long Bed (8'): Curt A16 5th Wheel Trailer Hitch # C16120

- Short Bed (6-1/2'): Curt A16 5th Wheel Trailer Hitch w/ R16 Slider # C16521

The only other thing you will need is a 5th wheel wiring harness, the Curt 5th Wheel/Gooseneck Custom Wiring Harness # C53CR.

expert reply by: Kyle S

1

Answer 1

The Curt Base Rail Kit #C16200 is a universal option so technically it will fit your 2020 Chevy Silverado 1500 but you will likely have to drill through your frame to get it to fit. To avoid drilling into your frame I recommend using the Custom…

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Answer 2

According to my research the weight ratings your found for your 2015 GMC Sierra 2500HD Duramax Crew Cab 4WD are correct but it is always a good idea to confirm this with your copy of the owner's manual. Since 5th wheel or gooseneck towing places…

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Answer 3

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 4

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 5

Choosing the right height setting for your 5th wheel hitch is a combination of a few different variables. First of all you want your towing setup to be as level as possible. With your Montana High Country 340BH level you will want to measure from the…

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Answer 6

Most fifth wheel rails are made to the same industry standard dimensions. They aren't all though. If you measure 22 inches on center between the two rails and they look like the rails of the #RP30035 that you referenced they would be the industry…

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Answer 7

The Ram OEM 5th wheel puck system, shown in the linked photo and article, was launched in 2013 so what you have in your truck is likely to be an aftermarket installation of some kind. These newer Ram trucks with the factory prep can directly accept a…

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Answer 8

To get the B&W Patriot #BWRVK3200 to work with your 2006 Dodge Ram you're going to need a set of 5th wheel rails #DM8552016-71. These rails are custom fit to your vehicle so they'll just bolt right up to the frame. It is worth mentioning…

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Answer 9

The head alone for the B&W Companion hitch #BWRVK3500 weighs about 70 pounds. Everything else weighs about 130 pounds. So the total weight of the hitch is approximately 200 pounds.

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Answer 10

If you take a look at the linked diagram you can see the minimum recommended clearance distances between truck and trailer for 5th wheel towing. It is recommended to have at least 5-inches from the top of the bed rails to the bottom of the trailer…

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Answer 11

The factory prep package or pucks are not the same between Ram, GM and Ford. The spacing is all different which means you cannot use a 5th wheel hitch for Ram pucks on a GM with pucks. Take the Curt A25 5th Wheel Trailer Hitch for example which is…

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Answer 12

Hey Jay. It sounds like you are on the right track here because a sidewinder pin box will be your only option for pulling your 5th wheel since you have a short bed truck with the Rambox. That said, you are right that the Reese Sidewinder cannot be…

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