While US manufacturers like Ford, Ram, and Chevrolet have all launched new versions of their popular pickup trucks recently, the current Toyota Tundra has soldiered on since 2007, making it the oldest full-size truck sold in the US. A new model is long overdue to help it catch up with its American competitors, especially since sales have been slow in the US lately. Fortunately, an all-new Tundra is on the horizon.

We already know the new Tundra will adopt a hybrid powertrain, and now insiders have allegedly leaked the details about the pickup's electrified unit to TFLTruck.com. If the rumors are true, the new hybridized Tundra will have impressive performance and efficiency.

According to the insider, the next generation of Toyota's full-size truck will use a version of the company's 3.5-liter turbocharged V6 engine in combination with an electric motor and lithium-ion battery system. Reportedly, this powerplant is very similar to the one used in cars such as the Lexus LS 500h.

While this system produces 354 horsepower and gets 33 MPG on the highway in the Lexus, the source claims it will be more powerful in the new Tundra and produce around 450 hp and 500 lb-ft of torque while still achieving 30+ MPG. According to the source, the design of the body, cab, and bed of the new Tundra haven't been finalized yet, but it's getting close to completion.

It's worth noting that these rumors haven't been confirmed by Toyota, so we'll have to wait until the new Tundra is officially revealed. However, the new Tundra is expected to be more technologically advanced than its predecessor and come equipped with air suspension and a 10-speed automatic transmission.

Expect the next-generation Toyota Tundra to be revealed by the end of the year and go on sale next year as a 2021 model. Considering it will face such tough competition in America's full-size pickup segment, it certainly has a lot to live up to.