A web site should be of interest to you
Here. and here's some more information found by google search "towing capacity of toyota highlander hybrid".
3,500 pounds
The Toyota Highlander is rated at 1,500 pounds towing capacity. To Achieve the 3,500 pound capacity you have to have the factory installed tow package, largest engine and AWD. You cannot buy a Highlander without the factory tow package and make your vehicle rated to
3,500 pounds towing capacity.