OEM Gooseneck install 2018 2500

[Tony_2500]

I couldn't find by searching anything on installing the oem gooseneck prep package - if anyone knows of a video etc please let me know.

I purchased the OEM prep package and it will be here in a few days. I was ready the directions and it clearly states that the center where the cartridge is to be installed you have to drill out a 4 inch hole and the stanchions are going to be 3 3/4 inch holes in the bed - then I will need to lift the bed 6 inches to complete the install of the brackets.

My issue is this - under my truck 2018 there is already a hole in the frame where the center bracket will be installed but this hole is only a 3 inch hole. I called the dealer and they verified that I did order the correct part according to my vin. He told me that i will need to widen the frame hole that is currently there. I am thinking the guy at the dealership is wrong and that the 4 inch hole is only in the bed of the truck and not on the frame?

Anyone ever install an OEM, there are a few reasons I went with OEM over b&w etc. Once reason is because I will be installing the upper brackets and will use the ram rail system. I pull a horse trailer and then will also have a 5th wheel soon too. Have already thought about the 5th wheel adaptor on the 5th wheel to gooseneck.

Thanks all

 

[crash68]

The larger 4" hole needed through the floor of the bed is needed for the trim ring and cover that you put in place when you remove the hitch so the bed floor doesn't have a hole where the hitch goes.
I remembered this from my buddies 2500 that came from the factory with it installed (I pulled the cover off...oops)

 

[Tony_2500]

Thats what I thought - i was thinking the parts guy was wrong - Why would i need to widen the factory frame hole. This makes sense that it is just the box hole. Thanks

 

[cuttymcgavin]

Hey Tony, how did it go? I have read that on the 2500 there is room to get the pucks in there without lifting the bed. How about the gooseneck plate and bolts, did you need to raise the bed to get those in? Looking into doing this prep pack in mine this winter.