Originally Posted by owner's manual

Weight of the Trailer
How heavy can a trailer safely be?
It should never weigh more than 1,500 lbs. (680 kg)
under normal driving conditions. It should never weigh
more than 1,000 lbs. (450 kg) when driven on long
grades at high ambient temperatures (Above 90 deg. F).
But even that can be too heavy.
It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to pull a
trailer are all important. And, it can also depend on any
special equipment that you have on your vehicle.