I have a 2015 Sierra 1500 4x4 crew cab 6.5 ft box. Payload is 1985, with me and daily items I have 1760 left over. Tongue weight of trailer is 1230ish full of 800 lbs of water without my blue ox, 880 with. My truck has the 5.3 with 6 speed 3.73 gears. 1850 is definitely possible and I would say probable.
Loaded for 4 days, I am 92% of my GVWR and under 90% of every other rating of the truck.
What do you carry in your truck daily? Box 3439Tools, running boards, box cover?
How many people will you be taking with the trailer at the most?
This will give you a total daily load, then add camping gear, bikes, wood, generator, everything that goes or could go with you on a 2 week holiday type trip.
That number is your "cargo". Say it's 800-1100 lbs. 1850-1100= 750 lbs tongue weight
750/.15(hitch weight max) gives you a GVWR of 5000
If it is less say 800 cargo that leaves 1050
1050/.15 gives a GVWR of 7000
Or trailer is 14.2% hitch weight and it can go as low as 10%, at 15% you should definitely be safe, if you want to go to 12.5, as long as you load to 12.5 and not 15 then that can also work for you and gives a lot more room.
My advice go by trailer GVWR rather than dry weights. Every trailer including used will give you the GVWR but "dry" is open to so much complication and confusion, use gvwr.
There will always be the rainy parade people and nay sayers, be honest with yourself and do a little bit of math, you will be within spec, and enjoy your new adventures that will come with your new truck and trailer.