Underbed Rail 5th Wheel Setups for 2017 GMC Sierra 1500 Short Bed
Updated 09/26/2025 | Published 04/23/2025
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Question:
2017 gmc sierra short bed. What 5th wheel system with underbed rails will work for my truck. Only need 14k. About to go with the curt flip and store gooseneck with offset convert a ball 5th wheel adapter. But would like to see other 5th wheel options.
asked by: Tim L
Expert Reply:
Hi Tim; do you have the 5-1/2' bed or the 6-1/2' bed? The only aftermarket underbed rail system is from Demco. If you want to use a sliding 5th wheel hitch the Demco Autoslide 5th Wheel Trailer Hitch # DM98SV will work and includes the underbed rail kit. This is compatible with 5-1/2' and 6-1/2' bed configurations.
Outside of that you're looking at a gooseneck setup like the one you described. If you have the 6-1/2' bed you can use the B&W Turnoverball # BWGNRK1057 along with the B&W Companion # BWRVK3400-5W. If you have the 5-1/2' bed the Curt Double Lock # C615-632 is the only option. This is compatible with the Convert-A-Ball # CAB-C5GX1216 which has a 7-1/2" offset.
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Robin H.
9/26/2025
Hi Tim, did you decide between the Demco Autoslide 5th Wheel Hitch and the gooseneck setup for your Sierra? I'm curious to know how it worked out for you, as it could help others in a similar situation.