Demco Gooseneck - Gooseneck for Fifth Wheel Rails - DM5988 Review Video

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…

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.

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.

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.

I was able to get a dimension sheet from my contact at Curt for the Curt Hitch part #C15800 that you referenced. See attached pic. I also attached a set of the installation instructions for this hitch.

To slightly lower your trailer that has had an "axle flip" kit installed you would want to use slightly shorter shackle straps, not longer ones. Shorter shackles will let the axle rest closer to the trailer frame, which lowers the trailer…

If the shackle straps are within a 1/2" of what you normally had, say the 2-5/8" #115052 to 3-1/8" #TRSL313, you should be okay to install them. Just make sure that all of your shackle straps match though. If you are using the longer…

Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move. What is the…

Trailer manufacturers don't usually keep a record of parts like these that they install at the factory, so I cannot be sure as to the exact length of the shackle strap that would have come originally on your trailer. With this in mind, a 3-1/8…

The Prodigy P3 part #90195 will work for you because your trailer has electric brakes. The P3 can install and work just fine on vehicles with air brakes. The only thing it needs from the vehicle is access to a circuit that only sees voltage when the…

Based on the 12,400-lb base weight of your 2016 Reflections 357BHS you should have the Equa-Flex Cushioned Equalizer #LC279688 which works with 6K to 8K axles. The wet bolt to use is part #LC126238; you will need 7 for each side of the trailer, so 14…

The problem that you are going to run into no matter what 7-Way you want to put on your trailer is that the color of the wires used is not standardized. Trailer manufacturers or people who rewire their trailers at any point can use any color they…