Your truck ratings are on the bottom line of the top chart, gross combine weight rating of 14,000 lbs. with the truck and trailer with the contents, pay load, in the trailer.
That is a light duty truck with a GVR of 6,200 lbs. , I would weigh it as you drive it and then decide on what weight and length trailer you want to tow
I've own three different enclosed trailer, two 24 Ft. 10,000 GVR and one 22 ft. 7,000 lb. GVR. I bought the 22 ft. new and specified what I wanted in it, the salesman promise me it would weigh under 3,000 lbs. empty, he LIED
It weighed 4260 lbs. empty
I towed that trailer and my current 24 Ft. Pace with a 1998 Ram 2500 short bed extended cab CTD, it had a combine towing capacity of 16,800 lbs. is what I remember. I spun it out on black ice on my first trip moving up here to Oregon,it bent up th edrivers side of the bed and hurt the towing hitch, NOT GOOD
I ended up buying a 2006 Ram 3500 four door 4 wheel drive long bed after we moved in here in Bend, Or due to the bad winters, it works great towing
I have weighed my current 24 Ft. Pace and it weighed around 8650 lbs. hook up to the truck with my old pump gas Street Duster which weighed 3450 lbs. with me in it so subtract 260 lbs. from that for the empty weight of the car, that trailer weight is with a medium size tool box , big 5500 watt Yamaha commercial generator, two floor jacks, one regular size and one small size, extra engine oil, tranny and rear end fluids, 8 to 10 spare tires and wheels for the car and trailer
The trailer does add about 750 lbs. onto the trucks rear axle and lightens up the front axle around 450 lbs.
Make sure and buy a trailer that has the 6000 lb. or larger rated axles and 16 inch wheels and tires, stay away from the smaller rated axles and 15 inch wheels and tires.
I carry three spare trailer tires now mounted on the steel 6 lug wheels due to having blown two of them out on the road towing
I'm thinking and hoping to buy a good 34 to 38 ft. gooseneck car trailer with living quarters and 7000 lbs. axles and 8 lug 16 inch wheels and tires next
IHTHs