I just purchased an used 06 Chev 2500HD Duramax CC SB and it came with a Reese 30026 5th wheel hitch. The previous owner towed a 28 footer and they said they had no problems with this setup. I'm very new at this and am trying to figure out why it is necessary to get a sliding type hitch for a shortbed p/u if this classic hitch worked for them? Do I need to change out the hitch because I plan to tow a different trailer? Does it matter what type of head (attachment point) is on the trailer (ie: ball, rubber mounted, conventional)? As you can see I, I haven't purchased a trailer yet and trying to educate myself before the purchase. Thanks for any and all advise.