While there aren’t very many people who require a truck that can accommodate a gooseneck trailer and tow over 30,000 lbs, these customers do exist, and for them, there are beastly trucks like the 2020 GMC Sierra 3500HD and Ford Super Duty F-350.
The Fast Lane Truck recently put these two American heavyweights to the test. The YouTube channel assembled both a 2020 GMC Sierra Denali 3500HD and a Ford Super Duty F-350 for a comparison test, but that’s not all. They also acquired an 11,0000 lb, 40-foot Ironbull trailer for the test, which they loaded up with a18,860 lb CAT mini excavator. They then drove both trucks up into the Colorado Rockies, seeing how they dealt with the 30,000 lb load while towing uphill and downhill.
Both of the trucks TFL Truck acquired for its test were equipped with the available diesel engine. In the Sierra 3500HD, the optional diesel is a 6.6L L5P Duramax diesel V8 engine, which is paired with an 10-speed Allison-branded automatic transmission. The Ford, meanwhile, gets a 6.7-liter Powerstroke V8 and 10-speed automatic. The GMC is good for 445 horsepower and 910 pound-feet of torque, while the Ford makes 475 horsepower and 1,050 pound-feet.
If you’re wondering where the 2020 Ram 3500 was for this test, Fiat Chrysler has experienced some production delays with its next-generation heavy-duty pickups, so they didn’t have one available for TFL Truck‘s comparison. The channel plans to obtain a Ram 3500 once they are available and conduct the same test with it, however.
The TFL Truck reviewers were impressed with both trucks during this comparison, but they were disappointed to see that neither were able to hold a set speed on cruise control while towing the load downhill. They also had some other complaints and compliments for both trucks, so be sure to check out the video embedded below to hear their full verdict.