The most bigger and one of the best selling trucks nowadays is definitively the new 2021 GMC Sierra HD models. This heavy-duty truck offers all in one. It comes with an attractive and robust design, followed by an appealing cabin crowded with the latest security and techs. Besides that, the manufacturer added a longer bed and thanks to that, this model becomes class-leading in towing. GM boys currently boast the highest maximum towing capacity in its segment at 35,500 pounds.
As you may already know, both 2500HD and 3500HD models share the same mechanicals with the heavy-duty Chevy Silverado. Thanks to that, the new Sierra HD can easily rival equally powerful rivals such as the Ford F-450 and the Ram HD.

2021 GMC Sierra HD Offers Seductive and Strong Style
The forthcoming 2021 GMC Sierra HD is a heavy-duty truck that looks strong and attractive at the same time. This model is one of the best hard workers on the market. Thanks to its large bed it can tow up to 35, 000 pounds, which is a class-leading. Besides that, it looks handsome and it comes with more massive proportions and a new hood with a prominent scoop. If we compare the new-generation with the previous one, the upcoming models are quite more significant.
In terms of styling, the new GMC Sierra HD will not differ too much from the predecessor. However, there will be some visual changes and new 2021 Sierra GMC HD features LED headlights and taillights. We also like prominent C-shaped light blades that bring LED illumination to the daytime running lights. Roof-marker lights come standard on dual-rear-wheel models and Denali.

Interior Features
Inside, the upcoming 2021 GMC Sierra 2500HD and 3500HD will get better arrangements. Also, both gigantic trucks will get more features than before. For example, the manufacturer said that it would add a massive dashboard that hosts user-friendly switchgear and infotainment systems. Besides that, there will be multiple cab styles and the mighty Denali’s standard crew cab that is on the top of the offer.
In addition to a camera system, the new model will include no less than 15 cameras all around. The big GMC will also feature the new app that can control and monitor compatible trailer functions. As we said, the real luxury beginning with the Denali model. This trim will host exclusive leather appointments and better cabin materials than the base one.
2021 GMC Sierra HD Engine
With the newest 2021 GMC Sierra HD pickups, buyers will have a choice to go for two strong powertrains. The first engine that powers the 2500 model is a direct-injected 6.6-liter gasoline V8 that makes 401 hp and 464 lb-ft of torque. This model will be available with a six-speed automatic transmission and rear-wheel drive system. However, if you need more stability and better headling all-wheel-drive system can get optionally.
The next engine powers the 3500HD model. It consists of a Duramax diesel 6.6-liter V-8 that is more reliable and it provides 445 ponies and 910 lb-ft of twist. Unlike the gasoline model, the Duramax will use a new 10-speed automatic transmission. Whatsoever, the new 2021 GMC Sierra HD models, thanks primarily to strong engines, boast the highest maximum towing capacity of 35,500 pounds.

2021 GMC Sierra HD Release Date and Cost
The upcoming 2021 GMC Sierra HD trucks models will probably be released sometime this year with some modifications here and there. However, due to the Coronavirus outbreak, we cannot surely say exact debut, but the end of this year is very likely.
As for the price, the regular Cab 2500 HD Sierra with a 2WD system and a long box will start at $35,600. However, going up to 4WD Crew Cab Denali with a long box and dual rear wheels, the price will jump to $57,700. The most expensive model is 3500HD Denali diesel with a dual rear wheels system and it starts higher than $80,000.