2021 GMC Sierra 3500 HD Denali, Release date, AT4, Colors, Dually

After the last-year redesign, it is pretty much obvious that the 2021 GMC Sierra 3500 HD won’t feature too many changes. Simply, we are talking about the second production year, which usually doesn’t bring any particular novelty. This capable pickup truck shouldn’t be an exception and the latest reports suggest that most of the changes will be those in terms of new color options, new standard features etc. On the other side, the overall layout will certainly remain the same.

This means that you may count on a pickup truck that offers strong performances, combined with an attractive styling and decent ride quality. While some may complain about the interior quality, but things are actually more than decent. Also, the list of standard and available equipment is pretty long. Considering that there are no bigger changes to come, we presume that the 2021 GMC Sierra 3500 HD will hit the market sometime late in the year.

2021 GMC Sierra 3500HD

2021 GMC Sierra 3500 HD Redesign

In terms of base design characteristics, the 2021 GMC Sierra 3500 HD definitely won’t change. We are about to see a familiar layout, which debuted last year. Of course, the new model is once again based on the light-duty sibling, which comes in the form of Sierra 1500. Furthermore, all Sierra models are closely related to Chevy Silverado trucks, and that can be seen not just in terms of mechanics, but on the inside as well.

The styling won’t change for the next year, though we are about to see some new color options. According to the latest reports, two color options will be removed from the current offer, while three new will be added. Other than that, we don’t expect to see any particular aesthetical changes.


The interior design of the new generation was probably the biggest disappointment. The recent redesign has brought all kinds of improvements but the cabin remained largely the same as in the previous generation. That may bother some drivers but we feel that those who are looking for strong performances and work capabilities won’t bother with this aspect too much. After all, the overall quality is on a decent level, while the list of standard and available features is quite long.

2021 GMC Sierra 3500HD Interior

When it comes to cab designs, count on three familiar layouts – Regular, Double and Crew cab, which all come in various configurations, depending on the bed size.


We’ve already mentioned that there is a chance to see a couple of additions in terms of new features. Still, most of the things are about to remain the same. Moreover, the trim level organization is also about to remain the same.

The base model may be primarily a work machine, but it comes with a couple of nice goodies, such as chrome bumpers, LED headlights, a 7-inch touchscreen display, Bluetooth, and Apple CarPlay and Android Auto. The SLE model adds cruise control, power windows and remote keyless entry. The SLT adds more standard features, while the range-topping Denali comes not just with more standard equipment, but also with numerous exclusive details.

There is also the off-road-oriented AT4 model, which is equipped with goodies like standard 4WD, an off-road suspension, skid plates, a locking rear differential and all-terrain tires. Also, there are several unique styling details.

2021 GMC Sierra 3500 Engines

The engine lineup certainly remains the same. So, base models will come equipped with a new 6.6-liter gasoline V8, which features a max output of 401 horsepower and 464 pound-feet of torque. It comes in pair with a 6-speed automatic transmission and although it doesn’t offer towing ratings as the diesel, it’s great for hauling. Depending on a version you choose, the max payload can go up to 7.500 pounds.

If towing capacity is your main concern, then go for a diesel. This pickup truck comes with a well-known 6.6-liter turbodiesel, which puts out around 445 horsepower and 910 pound-feet of torque. When properly equipped, this version can tow up to 35.500 pounds.2021 GMC Sierra 3500HD AT4

2021 GMC Sierra 3500 Release Date and Price

Since there are no significant changes to come for the next year, the 2021 GMC Sierra 3500 will hit the market sometime late in the year. Base models should go around 37.000 dollars. Of course, key competitors will be models like RAM 3500, Ford F-350 etc.

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