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The 2023 GMC Sierra HD AT4 is a designated trim level providing off-road features to turn your driving experience up several notches. Big trucks don’t have to stick to the roads, as the heavy-duty AT4 model will attest. This Sierra pickup comes in 2500 or 3500 varieties to ensure you have the big GMC truck that’s ready for some trail riding fun.

What makes the 2023 GMC Sierra HD AT4 a capable off-road truck?

A Red 2023 GMC Sierra HD AT4 truck posed
2023 GMC Sierra HD AT4 | GMC

GMC gives us a heavy-duty pickup made to handle the challenges faced when pulling a heavy load on an unpaved path. The AT4 trim of the Sierra HD accomplishes this task with special features, including Rancho shocks and all-terrain tires. This trim is available in both the three-quarter-ton, 2500 model and the one-ton, 3500 version.

What does the AT4 HD package include?

A Red 2023 GMC Sierra HD AT4 Wilderness Shot with mountains in the background of this heavy-duty truck
2023 GMC Sierra HD AT4 Wilderness Shot | GMC

The AT4 trim of the 2023 GMC Sierra HD delivers a package of off-road features. Items made for this purpose include:

  • Rancho shocks
  • Skid plates
  • Off-road inclinometer
  • All-terrain tires

This truck also has:

  • 18-inch wheels
  • Bluetooth connectivity
  • Satellite radio
  • Smart device integration
  • Wi-Fi hotspot
  • Leather upholstery
  • Navigation system
  • Steering wheel audio controls
  • Power mirrors
  • Heated and cooled front seats
  • Heated rear seats
  • Keyless entry
  • Multi-zone automatic climate controls
  • Power front seats
  • Remote engine starting
  • Driver’s side memory settings
  • Push-button starting
  • Telematics
  • Rearview camera
  • Tire pressure monitoring
  • Stability control
  • Traction control

Where are the advanced safety features for the GMC Sierra HD AT4?

When you want the benefits of advanced safety features, you have to add them as optional equipment to the Sierra HD AT4 pickup truck. Some items you can add, include:

  • Rear cross-traffic alerts
  • Rear parking assist
  • Blind-spot monitoring
  • Lane departure warning

Of course, if you add any of the three optional packages for the GMC HD AT4, you’ll receive the desired safety features and several other items. These options packages and their prices are:

  • AT4 Preferred Package – $2,075
  • AT4 Premium Plus Package – $8,075
  • Driver Alert Package I – $890

Is the Sierra HD AT4 lifted?

Black 2023 GMC Sierra 3500HD pulling a heavy load
2023 GMC Sierra 3500HD | GMC

No, the GMC Sierra HD AT4 is not lifted. It has the standard ride height but includes the added off-road equipment to make this truck more capable on the trails.

What’s the starting price for the 2023 GMC Sierra HD AT4?

The Sierra HD AT4 in the 2500 model begins at $64,100. At this price, you’ll have a Crew Cab build that fits five people and a truck bed that measures 82.2 inches long and 71.4 inches wide.

Are there different power options for this GMC truck?

Yes, you can have either a 6.6-liter gasoline V8 engine or a 6.6-liter turbocharged Duramax diesel engine. The Duramax engine is a $9,890 upgrade, but it delivers exceptional towing capacity that reaches 18,000 pounds for the 2500 model and 36,000 pounds for the 3500 version.

The gasoline engine uses a 6-speed automatic transmission to deliver power to the wheels, while the diesel engine mates to an Allison 10-speed automatic transmission.

Should you buy the 2023 GMC Sierra HD AT4?

This heavy-duty off-road GMC truck is hard to beat. It has all the right equipment to be a great truck out on the trails. If you’re shopping in the 2500 class, the Ram Power Wagon could be a better option. This Ram is lifted, articulated, and made for off-road performance. On the other hand, when shopping in the 3500 class, the Sierra HD AT4 is an excellent choice.

Next, learn more about the high price of one of the worst midsize trucks, or watch the Sierra and Ram tear up some trails in the video below:


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