GMC Sierra AT4 Review: What You Should Know

I’ve always liked trucks that mix power and comfort. The GMC Sierra AT4 caught my eye, and I wanted to know more.

So, I dug into the details, and now I’m sharing what I found. This isn’t just a work truck. It’s built for tough roads but still feels nice to drive every day.

In this blog, I’ll walk you through everything that makes the Sierra AT4 stand out. I’ll cover the engine, the design, the features, and all the little extras.

I’ll also go over trim levels, towing power, and what you can expect inside the cab.

If you’re looking for a strong pickup that looks good and gets the job done, the AT4 might be worth a look.

I’ve kept it simple and easy to follow, so let’s take a closer look at this bold GMC truck.

What Is the GMC Sierra AT4?

The GMC Sierra AT4 is a bold version of the Sierra 1500 pickup. It’s made for off-road driving but also works great for daily trips.

It comes with a strong engine, four-wheel drive, and a high stance that helps it handle rough roads.

But even with its tough build, it still feels nice and smooth when driving on the highway or in town.

This truck mixes power, style, and comfort. It’s built to do hard jobs but also has features that make it fun to drive.

If you like adventure but still want a clean, roomy ride, the AT4 is a solid choice.

GMC Sierra AT4 Features and Performance

The GMC Sierra AT4 is more than just a good-looking truck. It’s packed with features made for real use, tough jobs, weekend fun, and everyday drives.

1. Engine Options and Power

The GMC Sierra AT4 gives you a few engine choices, each with strong performance:

• 3.0L Duramax Turbo-Diesel I6: It is great for long drives and pulling power. It offers about 305 horsepower and 495 lb-ft of torque, which is a good mix of strength and fuel savings.
• 6.2L V8 Gas Engine: More power for towing or tough roads. This one has 420 horsepower and 460 lb-ft of torque. It’s the top pick if you need a lot of muscle.

Both engines are paired with a smooth 10-speed automatic transmission. It helps with easy shifts and better control, especially when towing or driving uphill.

2. Fuel Efficiency

For a truck this size, the GMC Sierra AT4 does well with gas. Here’s a quick look:

• 3.0L Turbo-Diesel: Around 22 MPG in the city and 27 MPG on the highway.
• 6.2L V8 Gas Engine: About 15 MPG in the city and 20 MPG on the highway.

The diesel option gives better fuel savings, but the V8 gives more raw power. It depends on what you need the truck for.

3. Towing and Hauling

Towing is one of the main reasons people buy the AT4. And it delivers:

• Max towing (with diesel): Around 9,000 pounds
• Max towing (with V8): Up to 13,000 pounds
• Payload capacity: About 2,000 pounds

You can tow boats, trailers, or campers with ease. The truck also has features like trailer sway control, hill start assist, and available trailer cameras to help make towing safer.

4. Exterior Design

The Sierra AT4 looks tough and ready for anything. Some key features include:

• Raised suspension and off-road stance
• Dark chrome accents
• AT4 badging and red recovery hooks
• 20-inch wheels with all-terrain tires
• LED headlamps and fog lights
• Optional power steps and spray-on bedliner

The front grille is bold, and the whole truck has a rugged look. It stands out without being too flashy.

5. Interior Comfort

Inside, the Sierra AT4 feels like a step up. You get high-end touches, soft leather seats, and smart controls. Here’s what you can expect:

• Front bucket seats with heating and cooling
• Rear seats with heat in some trims
• Large center console and plenty of cupholders
• AT4 logos stitched into the seats
• Available sunroof and rear sliding window

The cabin is quiet thanks to sound-blocking materials. You’ll feel like you’re riding in a premium vehicle, not just a work truck.

6. Infotainment System

The GMC Sierra AT4 has a modern tech setup that’s easy to use:

• 13.4-inch touchscreen
• Apple CarPlay and Android Auto
• Google built-in apps (Maps, Assistant, Play Store)
• Wi-Fi hotspot
• Wireless charging pad
• USB ports for front and rear seats
• Bose premium sound system (available)

The screen is bright, and the menus are simple. You can connect your phone in seconds and keep your devices powered on the go.

7. Driver Assist and Safety Features

Safety matters, and GMC adds many helpful features:

• Forward Collision Alert
• Lane Keep Assist with Lane Departure Warning
• Automatic Emergency Braking
• Front and Rear Park Assist
• Blind Zone Alert
• Rear Cross Traffic Alert
• Adaptive Cruise Control (available)
• HD Surround Vision camera system

These tools help you stay aware of your surroundings and avoid accidents. Some come standard, while others are part of optional packages.

8. Off-Road Features

What makes the AT4 different is its off-road package. Here’s what helps it shine on dirt, mud, or rocky trails:

• 2-inch factory lift
• Off-road suspension with Rancho shocks
• Skid plates to protect the bottom of the truck
• Hill Descent Control for steep drops
• Four-wheel drive with a two-speed transfer case
• Selectable terrain modes

These parts make the AT4 ready for weekend adventures or tough work sites. It’s more than just a pretty truck; it’s built to go off the beaten path.

9. Trim Levels and Options

The AT4 is one trim in the GMC Sierra 1500 lineup, but it can still be customized. Some trims and add-ons include:

• AT4 (standard): Great features for most drivers.
• AT4X (premium): More off-road gear, high-end leather seats, and advanced shocks.
• Technology Package: Heads-up display, rear camera mirror, and more.
• CarbonPro Edition: Carbon-fiber bed and special wheels.
• Trailering Package: Extra tools for hauling.

These options let you build the truck the way you want it, whether for daily use or weekend fun.

10. Cargo and Storage Features

The Sierra AT4 also has a smart bed design:

• Durabed with more cargo space than many trucks
• 12 tie-downs and available LED lighting
• Corner steps built into the bumper
• MultiPro tailgate with six functions (acts as a step, work surface, or load stop)

Inside the cab, you also get under-seat storage, door pockets, and a big center bin. These allow you to keep tools, snacks, and other items close by and organized.

11. Ride Quality and Handling

Even with its size and strength, the AT4 drives smoothly. Here’s why:

• The suspension system absorbs bumps well
• Good turning radius for a large truck
• Strong brakes and responsive steering
• Quiet cabin at highway speeds

It feels firm but not rough. You won’t feel every bump, even on gravel roads.

12. Customization and Accessories

GMC offers many ways to make the AT4 fit your style:

• Running boards and mud flaps
• Roof racks and bed covers
• All-weather floor mats
• Off-road lights and winches
• Seat covers and custom wheels

You can order these from the dealer or obtain them as needed later.

13. Color Choices

The GMC Sierra AT4 comes in several bold paint colors:

• Summit White
• Onyx Black
• Titanium Rush Metallic
• Volcanic Red Tintcoat
• Deep Bronze Metallic
• Sterling Metallic

The black and red shades look especially sharp with the truck’s chrome and trim details.

14. Price and Value

The price for the 2025 GMC Sierra AT4 starts around $68,000. This can be further enhanced with upgrades or the AT4X trim. While it’s not the cheapest truck, it gives you a lot:

• Off-road parts built in
• Comfortable cabin
• Modern tech
• Strong towing
• Nice looks inside and out

If you need both work and play in one truck, the price is fair for what you get.

AT4 vs AT4X: What’s the Difference?

The AT4 and AT4X are both off-road-ready trims of the GMC Sierra 1500. But the AT4X steps things up with more high-end parts and serious off-road tools. If you’re unsure which one fits your needs, this table breaks it down clearly.

If you want a capable, off-road-ready truck with comfort and power at a fair price, the AT4 is a smart choice. If you want more luxury touches and extra tools for serious trails, the AT4X is worth the higher cost.

Both trucks are solid, but your pick depends on how much off-road performance and comfort you really want.

How GMC Sierra AT4 Compares to the Competition

The GMC Sierra AT4 sits in a tough spot with many strong trucks in the market. Here’s how it stacks up:

• Ford F-150 Tremor: This truck is also off-road ready, with similar power and features. But the Sierra AT4 offers a quieter, smoother ride inside.
• Ram 1500 Rebel: The Rebel is stylish and strong. It has a nice interior, but the Sierra AT4 gives you more towing power.
• Toyota Tundra TRD Pro: The Tundra is great off-road, but the AT4 has more tech and comfort features.

Overall, the Sierra AT4 stands out with its mix of power, luxury, and off-road features. It’s a good middle ground for drivers who want it all.

GMC Sierra AT4: Best Packages and Upgrades to Consider

If you’re looking to upgrade your AT4, these are a few packages and extras that really add value:

• Technology Package: Includes a head-up display, rear camera mirror, and more high-end tools.
• Trailering Package: Adds trailer brake controller, hitch guidance, and camera views that make towing easier.
• CarbonPro Edition: Comes with a carbon-fiber bed, unique wheels, and extra protection.
• Off-Road Assist Tools: Look for options like underbody cameras, extra skid plates, and mud terrain tires.

These extras may cost more but give you more use, safety, and comfort.

Resale Value and Long-Term Ownership of the AT4

A little planning can save you money and help you get the right setup for your needs.

The GMC Sierra AT4 holds its value well. After 3 to 5 years, it tends to keep a high trade-in price, especially if it has lower miles and off-road packages.

GMC is known for building tough trucks. With proper care, the AT4 can stay in good shape for years.

The diesel engine, in particular, is known to last longer with fewer problems. And because it’s a special trim, buyers often look for it used.

If you keep up with oil changes, tire checks, and brake work, this truck can serve you well over the long run.

Tips for Buying the AT4

Thinking about buying a Sierra AT4? A few simple tips are:

• Compare the AT4 and AT4X: Make sure you’re not paying for features you won’t use.
• Check dealer stock: Trucks with popular packages sell fast, so plan ahead.
• Ask about deals: Look for cash offers, trade-in bonuses, or lower interest rates.
• Take a test drive: Try both engines if possible; the diesel and V8 feel very different.

A little planning can save you money and help you get the right setup for your needs.

Conclusion

After learning everything about the GMC Sierra AT4, I can say it’s a strong and well-rounded truck.

It has the power to tow and haul, the tools to go off-road, and the comfort to enjoy long drives.

I like how it looks bold but still feels smooth on the road. The mix of strong engines, smart features, and off-road parts makes it stand out.

I also like the options it offers. You can choose between a diesel or V8 and add packages that fit your needs.

If you want even more, the AT4X adds extra power and luxury. This makes the lineup flexible for different drivers.

If you want a truck that works hard but still feels good to drive, the Sierra AT4 is worth a look. I hope this review helped you learn more and decide if this truck is the right fit for your needs.