Can 2008 GMC Sierra 5-1/2 Foot Bed Tow Fifth Wheel Trailer and Tow Gooseneck Trailer

Updated 07/23/2019 | Published 07/22/2019

Products Featured in This Question

Curt Double Lock, Flip and Store Underbed Gooseneck Hitch w/ Installation Kit - 30,000 lbs

(698)

$575.40

Curt Spyder Gooseneck Trailer Hitch for Fifth Wheel Rails, 25,000 lbs GTW

(475)

$293.94

Reese Quick-Install Custom Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches

(119)

$416.99

Question:

I would like to install a under the bed mounted gooseneck hitch with the capabilities of incorporating a fifth wheel hitch I currently have a curt e16 fifth wheel and would like to stay with the curt brand

asked by: PAUL D

Expert Reply:

Since you know the bed length of your 2008 GMC Sierra 1500 is so short at 5-1/2 feet in length what you are asking for is a bit challenging to accomplish but I do have one solution that will work and allow you to use your Curt E16 hitch.

You are going to have to install a set of truck bed fifth wheel rails as there's no other way (I'll get to more on this later). So for a custom fifth wheel rail kit for your truck you would want the part # RP50064-58 from Reese as there isn't a Curt option, but this is compatible with Curt hitches. Now to convert this to a gooseneck you'll want the Curt Spyder part # 16085.

You will have to have a Sidewinder installed on your trailer to though.

Sidewinders are pin box specific so you will first need to know what pin box you have now in order to pick out the correct one.

There should be a sticker or a stamping on the OEM pin box of the trailer that will list the pin box number that is on the trailer.

Once you figure out which pin box you have you can check the FAQ I attached that has a chart that shows the correct Sidewinder to get based on which pin box you have.