I'd be more concerned about having more than 10 degrees of sway in the first place?? 2018 Silverado 1500?? Well, hope it works out for ya...
Not the trailer I'd tow with ANY "150" truck... But, that's just me.. I would not care what the "tow ratings" are for that size truck and that size trailer..
I shopped for my very first TT way back in 2002... Had a 97 F150 and I knew what I wanted for a TT... The sales guy kept taking me to rigs that had DRY weights of what my trucks MAX tow rating was and all he kept saying, "you'll be fine".. I basically told him to "pound sand" and said I know what I want and if you can't show me that, don't waste my or your time... I ain't gonna buy that big of a rig... He just rolled his eyes and I said thank you for your time and left..
OMG... I knew this some 17 years ago... Hard to believe the same stuff is still going on today...
Oh well.. You now have the rig... Ain't no hitch that's gonna make that an enjoyable tow..
"Farewell And Adieu You Fair Spanish Ladies"..
Good luck!
Mitch
2013 F150 XLT 4x4 SuperCab Max Tow Egoboost 3.73 gears #7700 GVWR #1920 payload. 2019 Rockwood Mini Lite 2511S.