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We just learned exciting news about the upcoming 2022 GMC Sierra AT4. Along with providing the GMC Sierra with more off-roading capabilities, the new AT4 model could have an optional diesel powertrain. It would be the only full-sized off-roading truck with a diesel engine available in the market aside from the Ram Rebel. 

The 2022 GMC Sierra AT4 gains diesel power 

An image of a 2021 GMC Sierra parked outside.
2021 GMC Sierra | GMC

According to Pickup Truck News, the 2022 GMC Sierra AT4 will have a 5.3-liter V8 diesel engine which provides 355 hp and 383 lb-ft of torque. Also, General Motors mentioned that the engine will offer an extra 37 lb-ft of torque, meaning it could have close to 500 lb-ft of torque! That’s a lot of power. 

The 2021 Sierra 1500 can tow up to 12,200 lbs when properly equipped. It can also carry a payload of up to 2,280 lbs. It’s currently unclear how much the AT4 will be able to tow when equipped with the diesel engine. 

The diesel engine is expected to be paired with a 10-speed automatic transmission. You can speculate that this truck will have an EPA-estimated 22 mpg combined. That’s pretty good for a sizeable off-roading truck. 

What to expect with the Sierra AT4

The 2022 GMC Sierra AT4 will receive an updated look to match its increased off-roading prowess. It’s safe to expect a wider stance. Plus, it will receive an additional two inches of ground clearance. 

Its face will gain a dark chrome grille and possibly revised LED headlights. The bumper also looks a little more aggressive. The rear end could incorporate new tail light and bumper designs as well. 

New styling elements include blacked-out exterior features, red tow hooks, and AT4 badging. There are standard 18-inch wheels, but you can upgrade to 20-inch wheels. The General Motors-tuned suspension includes an Eaton rear locking differential and Rancho shocks. 

What are the Sierra AT4’s features like? 

A black 2021 GMC Sierra AT4 parked in gravel in front of a lake
2021 GMC Sierra AT4 | GMC

The new 2022 GMC Sierra AT4 includes a premium interior with dark accents and luxurious leather seats. There are more high-quality materials than you’ll find in the base model. The 15-inch head-up display is one of the most anticipated features. 

Along with providing crucial driver information, the head-up display includes an inclinometer. This will allow you to see how level your truck is climbing up and over obstacles. We wonder if a forward-facing trail cam or 360 degrees camera view will also be included. 

The Sierra 1500 AT4 includes a new traction select system with off-road driving modes. Hill-start assist and hill descent control modes are included as well. Optional driver safety and assistance features may include blind-spot warning, lane-keeping assistance, and adaptive cruise control. 

However, the 2022 Sierra AT4 model will not include the General Motors Super Cruise system. So, you won’t have the semi-autonomous driving feature, but that might not be a deal-breaker. This technology is still being mapped out. 

The Sierra 1500 AT4 will begin at around $56,000. This is a pretty good price for a full-sized off-roading truck. It may arrive at dealerships during the second half of 2021, and we can’t wait to learn more.


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