I'll bit.
I do see lots of GM Dmax pulling rv trailers/big rv boats/large rv (show/sport) horse trailers.
I'm always looking at rigs pulling some type of GN flatdeck and even enclosed trailers for a living.
Since 1958 I've owned 14 pickups which most were GM products....three were Dodge/Cummins....two one ton Fords.
I see more Ford SD and Dodge/Rams HD in this type of work with GM a very distant third. IMO the reason is most (not all) GM dealers won't discount deep like Dodge/Ram and Ford truck dealers around here anywayz.
For pulling a RV any of the big three HD diesel pickups works fine.