What trailer did you get so we can look up the info on it. Does you truck have a tow package? The V6 models in that year were offered with a towing package. Which engine package do you have?
That year truck came with two engine options.
The 2.7L I4 (Standard in all regular and access-cab trucks regardless of drive train, not available in the X-runner or double cab trucks)
159 hp @ 5,200 rpm
180 lb.-ft. @ 3,800 rpm
Max. Towing capacity 3,500 lbs.
Max. Tongue weight 350 lbs.
The 4.0L V6 (Standard on the X-runner, and double cab trucks, and available in Pre-runner and 4x4 Access-cab trucks)
236 hp @ 5,200 rpm
266 lb.-ft. @ 4,000 rpm
Max. Towing capacity 6,500 lbs. (*except X-runner 3,500 lbs.)
Max. Tongue weight 650 lbs. (*except X-runner 350 lbs.)
The “towing package” consists of a class IV receiver hitch, supplemental engine oil cooler, transmission cooler (again automatic transmission only), Heavy-Duty battery, 130 amp alternator, fully functional 7-way round plug, and a plug and play brake controller pigtail.
Does your trailer have electronic brakes on it? If so you WILL need a brake controller. Just another thing to be thinking about.