"I read it on the Internet, so it must be true."
Everywhere I searched, web sites said the towing capacity of a 2017 Lexus RX 350 with the towing package was 3,500 lbs and without was 2,000 lbs. Then I pulled out my (massive) Owner's Manual and found that the limit is actually zero.
"Trailer Towing (vehicles without towing package)
Lexus does not recommend towing a trailer with your vehicle. Lexus also does not recommend the installation of a tow hitch or the use of a tow hitch carrier for a wheelchair, scooter, bicycle, etc. Your vehicle is not designed for trailer towing or for the use of tow hitch mounted carriers."
Lesson learned: Get up and go get the Owner's Manual. That's the end of that project.
Thanks for your help, guys.
