I have a 23 ft travel trailer (gvw 4360 lbs / gvwr 5500 lbs) I plan on towing it with my 2006 GMC 1/2 ton truck SLT 5.3 Eng. with the towing package, also installed in the truck are the trailer brake ...
Your good. I had a 2011 Sierra 1500 with tow package etc.. pulled a 24 ft trailer, GVW of 6400(ish), GVWR of 7500 if I remember correctly. Pulled no problem at all.