Well, the first time General Motors presented the Sierra 1500 model, to be honest – we didn’t expect too much. But, the all-terrain truck proves us wrong. Over the years, GM’s vehicle gains great popularity among the customers. The truth is, many of them choose the Sierra rather than Toyota Tundra TRD Pro, or Ford Raptor. Even though it’s more expensive than the competition, this model offers premium features and outstanding off-road capabilities. Of course, the upcoming 2021 GMC Sierra 1500 AT4 will deliver even better performances.
Also, you’ll find an excellent amount of standard and additional equipment. The brand-new truck comes with Double and Crew Cab configurations. Moreover, the all-wheel-drive setup will be standard. Still, the highlight of the 2021MY its outstanding off-road capabilities. Well, as you can see from the name itself – the AT4 represents All-Terrain-4WD.

What’s New For 2021 GMC Sierra 1500 AT4?
The brand-new 2021 GMC Sierra 1500 AT4 has a lot to offers. However, in this review, we will try to mention only the crucial features and updates. Also, we will look at some of the additional features as well. So, let’s begin with the all-new 6-way MiltiPro tailgate and an upgraded transfer case with tow gears.
Moreover, thanks to the Rancho shocks, the Sierra-unique suspension will absorb bumps during off-road driving. Also, the skid plates will protect the underbody from the hitting. The forthcoming Sierra AT4 will include auto-locking rear differential, and the dual-exhaust system as well. On top of that GMC brings a special traction setup, with off-road configuration.

Additional Equipment
Of course, the customers will have a lot of options to upgrade their basic 2021MY AT4. One of the additional features will be Goodyear tires, that can replace the basic off-road rubber. Also, there’s a Heads Up Display (HUD) with a rear camera mirror. The HUD system of the 2021 Sierra will be one of the most advanced on the market.
Furthermore, the customers can improve safety with available adaptive cruise control, and blind zone alert. Besides these features, General Motors offers an audio system for the tailgate, and CarbonPro bed.
Engine Specs
2021 GMC Sierra 1500 AT4 comes with a few engine choices. The most affordable option is a 5.3-liter V8 mill, which produces 360 hp and 390 lb-ft of torque. This unit is linked to a 10-speed automatic transmission with dynamic fuel management technology.
Next, for around $3,000 more, you can get a more powerful 6.2-liter V8 petrol engine, or a 3.0-liter Duramax diesel V6 drivetrain. The first one produces 420 hp/460 lb-ft, and it is the most potent mill in the lineup. On the other hand, the turbodiesel makes 277 hp and 460 lb-ft of torque and includes a special exhaust system to reduce emissions.

2021 GMC Sierra 1500 AT4 Price
The entry-level of 2021 AT4 comes with a 5.3-liter mill, Double Cab, and standard size box. The starting price for the base model will be around $53,000. However, if you choose the Crew Cab, it will add $4,000 to the price for a short bed, and $5K for a long one. Also, the 6.2-liter V8 petrol engine, as well as 3.0-turbodiesel will raise the price for $3,000.