In the vanguard of heavy-duty pickup truck titans, the 2021 GMC Sierra 3500HD may not be the paragon amongst its vehement rivals but with its authoritarian presence, potent powertrains, and near-unassailable dependability, it's the big kahuna of GMC's Sierra line and a very worthy vehicle in the classification. Rumbling beneath the Sierra 3500HD's hulking hood is a 6.6-liter V8 engine that musters 401 horsepower and 464 lb-ft of torque. However, GMC offers an even mightier Duramax turbodiesel V8 as an option for those who are really serious about hauling. The automaker has been continuously improving the fourth-generation Sierra 3500HD pickup, with this year's model receiving some nifty trailer-assistance technology and additional safety systems. There are, however, still a few flaws that hurt the Sierra 3500HD's chances against the likes of the RAM 3500, Ford F-350 Super Duty, and the Chevrolet Silverado 3500HD.
2021 GMC Sierra 3500HD Changes: What’s the difference vs 2020 Sierra 3500HD?
The GMC Sierra was completely redesigned for 2020 to bring it up to date in its class. As such, not much changes for 2021, except for some detail specification, trim, spec, and color changes. New trailer-assistance safety features have become available, such as a trailer-length indicator and jack-knife alert, and towing capacity is up. The MultiPro tailgate has now also been added as standard equipment to the SLE trim.
Read more - 2021 GMC Sierra 3500HD Review: The Big Kahuna
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