The truck can tow its rated load and also stop it safely.
However, don't kid yourself. The truck may not be the weak link in the chain of making the towing experience work -- you might be.
If you don't know how to balance a load on a trailer to avoid an overloaded tongue weight or a swaying trailer, start with a smaller load and experiment and seriously consider sway bars.
If you did not choose a trailer with adequate brakes, which are sometimes more than just the legal requirement -- get to know your rig before you pile on the weight at highway speeds.
If you don't know how to corner, panic stop or back-up from a boo-boo, practice.
If you can't match RPM's with HP and you don't have a supercharged engine from TRD, and you pull a heavy load in hilly country, you will be disappointed by the trucks poor performance.
And if you expect the truck to level itself with a heavy tongue load, so you can drive at night with the headlights on the road in someone's eyes -- think again.
Other than that, its a great pulling machine and up to whatever challenge you put to it.
Traveler