Can Demco Gooseneck Adapter # DM5988 be Used with Underbed Demco Rails DM8551009

Question

Question:

Hi! I have DM 8551009 and DM 8550032. Can I use a gooseneck hitch DM5988 with my existing under bed rail? Thank you!

asked by: Temur R

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Expert Reply:

Since you have a set of Underbed Demco Rails part # DM8551009 installed in your truck you can use the gooseneck adapter part # DM5988 that you referenced.

expert reply by: Jameson C

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Answer 1

I was able to go out to the warehouse and measure the center to center mounting posts for you on the #DM5988. I found that the center to center on the pin on the connecting same side of the bracket is 13-1/2 inches. The distance from the c2c of the…

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Answer 2

For the UMS underbed fifth wheel rail kit you have installed in your 2015 GMC Sierra 2500 all you'd need is the part #DM5988 and you'd be set.

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Answer 3

There is not a way to switch out the top of the Demco Hijacker with a gooseneck ball. However, if your Demco Hijacker fits under bed UMS Demco rails like the Demco Hijacker part #DM8550032 you can use the Demco Hijacker UMS Series Gooseneck Trailer…

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Answer 4

The Reese Goose Box #RP85FR referenced in your question, which is designed to replace the Lippert 1621, 1621HD and 0719 pin boxes, will not provide any additional clearance for short bed trucks above what the factory pin box offers. With the Goose…

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Answer 5

Since you've got the Demco Underbed Mount Series installation rails for your Hijacker Autoslide, in order to tow a gooseneck trailer you'll need to use the Demco Hijacker UMS Series Gooseneck Trailer Hitch for UMS Series Base Rails - 25,000…

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Answer 6

With clearance being the biggest issue for you, there is one option I highly recommend for a 5th wheel hitch that fits your 2019 Ram 2500 with a 6-1/2 foot bed, the Demco Hijacker Autoslide 5th Wheel Trailer Hitch with Slider #DM8550034. The Hijacker…

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Answer 7

You are going to want the slider version of the Companion Hitch part #BWRVK3400 unless your trailer happens to have a narrow nose designed for allowing short bed trucks turning clearance without a slider. You would know if your trailer had this too.…

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Answer 8

The Demco Rail Kit part #DM8551010 that you referenced is a confirmed fit for your 2015 GMC Sierra 2500 Short Bed. The gooseneck hitch adapter you would need to go with this rail kit is the part #DM5988.

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Answer 9

If you have the 6-1/2 foot bed, the Goose Box will not give you any more or less turning clearance than the Lippert 1621 pin box. The only way to increase your turning angle is to use a an offset adapter hitch like #DM8550045 and keep your 1621 pin…

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Answer 10

The Reese Goose Boxes like #RP85FR do not offer additional turning clearance beyond what a standard pin box would have so short bed turning clearance can be a concern. If the trailer has a tapered nose though typically you'll be alright. Also if…

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Answer 11

Your extended pin box doesn't actually give you 10 more inches of offset since when the trailer turns the pin box swivels which puts the trailer the same distance from the truck cab. The only time you can use an offset's distance in the…

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Answer 12

You're definitely going to want to do some test runs after installing a Goose Box, like part #RP85FR, or a trailer because you're correct that it's very unlikely you can make a full 90 degree turn. A Goose Box also doesn't increase…

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