Fifth Wheel Rail Install Kit Recommendation for a 2012 GMC Sierra 1500 5-1/2 ft Bed  

Question:

Expert Reply:

The Curt Install Kit with Rails, # C16411-204, that you referenced is designed to fit all hitches that are designed to fit industry standard fifth wheel rails. So yes, your Reese 14k hitch will fit this kit.

However, this rail kit isn't designed to fit your 2012 GMC Sierra with a 5-1/2 foot bed, instead you would want the part # RP50064-58. This is a very similar custom install kit that will work on your vehicle.

Since your truck bed is so short you will need to use a Sidewinder pin box on your trailer so that you will have enough clearance to make tight turns.

Sidewinders are pin box specific so you will first need to know what pin box you have know in order to pick out the correct one.

There should be a sticker or a stamping on the OEM pin box of the trailer that will list the pin box number that is on the trailer.

Once you figure out which pin box you have you can check the FAQ I attached that has a chart that shows the correct Sidewinder to get based on which pin box you have.

If you cannot find the number you can use the measurements of the bolt holes of the pin box to determine which one you have. I attached an FAQ on how to do this for you to check out also.

expert reply by: Jameson C

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