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Can Curt Adapter Rails # C16023 Work With ISR Fifth Wheel Hitch On 2017 GMC 3500  

Question:

I have a 2017 GMC 3500 long bed. Any reason I cant use the Curt C16023 to be able to install my non-sliding isr fifth wheel hitch? Thank you,

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Expert Reply:

The Curt Adapter Rails, part # C16023 will fit the pucks in the bed of your 2017 GMC 3500, but have not been tested with an ISR fifth wheel hitch.

The center-to-center distance between the slots for the fifth wheel hitch legs is 20-1/2 inches. The problem with using hitches other than the confirmed Curt hitches is the height of the angle on the adapter and how close it is to the fifth wheel leg hole. The angle measures 2-1/4 x 2-1/4 inches. My contact at Curt was not able to tell me how close the angle was to the slot.

The hitches that have been confirmed to work with this adapter are part # 16516, # C16521, # C16541, or # C16546.

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Jeffrey L
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Instructions for 16516Instructions for C16521Instructions for C16541Instructions for C16023
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