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Recommended ISR Custom Fifth Wheel Base Rail Installation Kit for 2021 GMC Sierra 2500  


I have a pullrite IRS series super 5th 16k 5th wheel hitch. I am looking for the rail kit for my 2021 GMC 2500 hd AT4 pickup


Expert Reply:

I suggest the Curt Custom Fifth Wheel Installation Kit for Chevy/GMC Truck, # C16429-204 for your 2021 GMC Sierra 2500. This ISR kit requires no drilling and provides a custom fit for your GMC Sierra 2500. Includes everything you need for installation.

Please note the linked installation video below.

expert reply by:
Michael R

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