2021 GMC Sierra 1500 AT4 Review

When the GMC introduced the new version of the Sierra 1500 truck, we didn’t expect too much. However, the all-terrain package shows good and more buyers are choosing this one over Ford Raptor and Toyota Tundra TRD Pro. It is more expensive than direct rivals, but it also offers more features with exceptional off-road capabilities. The new 2021 GMC Sierra 1500 AT4 will be even more impressive after a minor tuning.

The 2021 GMC Sierra 1500 AT4 will be available with Double and Crew Cab configurations. Also, the all-wheel drive is required. As you can guess, the highlight of the model is its off-road capability. The AT4 stands for all-terrain four-wheel drive. Numerous upgrades will make wild adventures more thrilling.

2021 GMC Sierra AT4

2021 GMC Sierra 1500 AT4 Accessories

There is a long list of features the off-road truck is bringing to the table. We will try to mention the most important and these advanced options you will hardly find elsewhere. The manufacturer introduced the all-new six-way MultiPro tailgate. However, the unique upgrade for the 2021 GMC Sierra 1500 AT4 is a 2-inch lift and the new transfer case with two gears. Of course, the unique suspension will soak bumps off the road thanks to Rancho shocks. Skid plates protect the underbody from hits.

The AT4 also gets auto-locking rear differential and dual-exhaust system. There is a special traction setup with off-road configuration. The company makes the interior posh with leather seats and exclusive details. Spray-on bedliner is standard.

2021 GMC Sierra 1500 AT4 accessories

Additional Equipment

There are some notable upgrades that you can add to your 2021 GMC Sierra 1500 AT4. For example, Goodyear tires can replace an existing off-road rubber. The HUD is also optional with a rear camera mirror. This system is one of the most advanced ones you can find. You can also improve safety with adaptive cruise control, or blind zone alert. Audio system for tailgate and CarbonPro bed are the high-end accessories to pimp up your ride.


The 2021 GMC Sierra 1500 AT4 is a trim level available with multiple choices. Besides the cab layout, you can also pick the most suitable engine for your ride. The least expensive option is a 5.3-liter V8 with 360 hp and 390 lb-ft of torque. In this case, you won’t get an eight-speed case, but a 10-pace automatic transmission with the dynamic fuel management technology.

If you are willing to spend around $3,000 more, you can add a larger 6.2-liter V8 petrol unit or a 3.0-liter Duramax diesel V6. The first one is the most capable unit in the lineup with 420 hp and 460 lb-ft of torque. The turbodiesel returns the best-in-class 277 ponies and 460 pound-feet. It also gets a special exhaust system to reduce emissions.

2021 GMC Sierra 1500 AT4

2021 GMC Sierra 1500 AT4 Price

The base configuration of the 2021 GMC Sierra 1500 AT4 includes a 5.3-liter engine, Double Cab, standard size box, and a $53,000 price tag. If you choose for the Crew Cab, you will add $4,000 for a short bed, and five grand for a long one. Finally, there are engine upgrades, with 6.2-l petrol and 3.0 turbodiesel cost $3,000 respectively.

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