Recommended Custom 5th Wheel Rail Brackets For 2017 GMC Sierra 2500 With 6-1/2 Foot Bed

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I recommend you use the Reese Brackets # RP50066 along with the Replacement Hardware Kit for Fifth Wheel Base Rails - 10 Bolt # RP58430. This will give you custom brackets and the hardware to fit your rails to your 2017 GMC 2500 with 6-1/2 foot bed.