I personally pull receiver stingers (what I call the ball mount) whenever they arent in use, not only to prevent rust damage, but to keep my shins happy, as well as not ever getting them stuck in the receiver hitch itself. I might make a bump bar in case I ever get rear ended, but for now, empty ass when no trailer is attached.
I like the factory GMT400 receiver for car trailer sized trailers, but on a bigger truck (my 99) I feel I should get something beefy when I get a flatbed for it (has a reese 2.5" half bolted to the truck, and the bed, and is also welded. half-assed, but strong, still hate it badly) and I plan on getting a B&W (same company as the turnover ball) receiver hitch, which they apparently have started making within the past year or two, as I never remember seeing it advertised.
Anyways, I am pleased, as they not only make it for GMT400 pickups, but they also make it for the GMT400 chassis cabs ( GMT400 chassis cab with rear fuel tank is same app as 73-87 with deep bumper, w/o tank is same as 73-87 with standard bumper, all 34 inch rails, all stated in the application chart)
I believe it is the only 2 inch receiver on the market over 15K (I believe it is 16K trailer, 1600 tounge, havent seen a stinger rated that high, except for B&W's complimentary line of stingers rated for use with the big hitch! so as I earn some $, my plan is my 2500s will get OEM, and 3500 and 3500HD will get B&W as far a receivers, and the 2500s will get B&W turnover balls. have to home-make frame mounted goosenecks for chassis cabs, gonna copy the one off of dad's 1990 chassis cab chevy.
also, since I am ranting, I want to share my theory on the receiver pin. I like to have the bent part on the drivers side, and the hairpin on the passenger, as if road debirs (truck gator, etc) or off road debris, (brush, beefy weeds, etc) catch the hairpin and take it off, you are lesss likely to loose the pin, as road crown and road vibration make stuff shift to the right, so theoretically the pin would never fall out.
anyways, thought I would share that potentially useless fact!
