Saying hi from NKy. Merry Christmas to all! Few questions on new Silverado purchase

 

New guy Retired and wanting to travel. Purchased 2014 Silverado 1500 5.3 crew 4x4 couple months ago getting ready to buy travel trailer this winter. Discovered the truck has a 3.08 gears which really limits my TT {6600 # tow max } purchase. Any opinions on do I look to trade up or change the gearing to 3.73 or 4.10. ? Maybe there is a thread that has already addressed this , but I couldn’t find it.
Would appreciate some advice!