As of 2014, the top-three flatbed tow trucks are the GMC Sierra 3500 Denali HD, Chevrolet Silverado 3500HD and Ford F-350 Super Duty, according to The Cheat Sheet.
The Ford F-350 Super Duty is powered by a 6.7-liter turbo-diesel V-8 engine, creating up to 400 horsepower and allowing the vehicle to tow up to 18,500 pounds. It's popular for its flexibility, since users are given the options to choose among different engines and engine or transmission layouts, according to Edmunds.com. The Chevrolet Silverado 3500HD and GMC Sierra 3500 Denali HD are capable of towing heavier payloads. Both models come with a Duramax 6.6-liter turbo-diesel V-8 engine and can tow up to 19,600 pounds.