As the manual probably explains, that weight limit has a lot of qualifications surrounding it; you need to follow all of the limits, including a limit on the total of the car, passengers, cargo, and trailer. You might find that you can only tow a 1500 lb trailer (and 1500 lb is a pretty typical 13-foot trailer when loaded) in combination with zero passengers and zero cargo in the car... which isn't likely to useful.
I agree with Frederick: with more specific information, a more useful answer can be provided.
1979 Boler B1700RGH, pulled by 2004 Toyota Sienna LE 2WD
Information is good. Lack of information is not so good, but misinformation is much worse. Check facts, and apply common sense liberally.
STATUS: No longer active in forum.