The GMC Sierra and Chevrolet Silverado, when equipped with the biggest V8 engine, have the edge in several key areas. The GM trucks have less horsepower and torque but, nonetheless, offer slightly more payload capacity and can tow 400 pounds more than the Toyota.
The GM trucks also get slightly better fuel economy than the Tundra. By EPA estimates, the Sierra/Silverado with the 6.0-liter V8 squeezes two more miles out of a gallon in both city and highway driving compared to the comparably equipped Tundra.
The most noticeable difference can be felt when driving the trucks. The GM trucks drive in a much more controlled and even-keeled manner than the Toyota. The Tundra feels more like a traditional big truck, pitching and rolling over bumps and around turns with steering that feels much less precise.
The Tundra's trump card, of course, is Toyota's well-earned reputation for reliability. That's backed up by the truck's overall solid feel.
In the end, the Tundra doesn't clearly trounce the competition. But it presents an option that cannot be ignored.