2025 GMC Sierra 1500 AT4 Specifications
If you’re an industrious driver who wants a truck steeped in both luxury and ruggedness, see the 2025 GMC Sierra 1500 AT4. It provides you with the performance, capabilities, tech, and safety features that only a GMC model can provide, making this full-size pickup a worthwhile investment for anyone in the market for a light-duty truck that you can use for daily driving, tough tasks, or off-roading. GMC made some modest but noteworthy changes for this year’s iteration, updating this off-road trim to provide greater value as a lavish light-duty pickup truck.
MSRP: $66,800[a]
Horsepower: 305
Torque: 495 lb-ft
Towing: 8,800 lbs
Exterior
Some minor superficial changes were made, with the GMC logo being present on the AT4’s exterior, along with new standard wheels and a spare tire for this off-road trim. The outgoing 18-inch wheels have been replaced with 20-inch machined aluminum wheels with Carbon Gray Metallic accents, tucked inside of all-terrain blackwall tires. However, the 18-inch machined aluminum wheels with dark accents are still optional for the AT4, though they come with MT Goodyear Wrangler Territory blackwall tires—a perfect option for anyone who wants a rugged flair for their pickup.
The 2025 Sierra 1500 AT4 is available in six different exterior colors. It comes standard in Summit White, but you can have it outfitted in Onyx Black, Sterling Metallic, Titanium Rush Metallic, Thunderstorm Gray, or Volcanic Red Tintcoat. In terms of its configuration, the AT4 is available exclusively in a Crew Cab with four doors, so it seats up to five people across two comfortable rows. You can also have this off-road trim configured in either a standard-length bed box (6.6 feet long, for 71.7 cu.ft.) or a short bed box (5.8 feet long, for 62.9 cu.ft.).
Off-Roading
The big selling point for the 2025 Sierra 1500’s AT4 trim is the ability to confidently venture off the beaten path thanks to its superior off-roading capabilities, with a four-wheel drivetrain and an AutoTrac two-speed transfer case. You have multiple drive modes available thanks to this transfer case, whether you’re tackling muddy backwoods, snowy roads, or rocky trails; these modes include 2WD Hi for highway and daily driving, 4WD Auto for varying road conditions such as icy or wet roads, 4WD Hi for improved traction on slippery surfaces, 4WD Lo for low-end torque (to get through deep snow, mud, or steep terrain), and Neutral.
The all-terrain tires make this truck trim viable for speeding around dirt trails, muddy pathways, and paved roads alike. You also get an off-road-tuned suspension designed for tackling difficult terrain while maintaining traction control and stability thanks to the StabiliTrak system; this way, you always feel in control even when dealing with unpredictable road conditions. The standard inclusion of a two-inch factory-installed lift gives you added ground clearance to clear obstacles on the road or trailway, with improved approach and departure angles to better protect the vehicle when driving over undulating or uneven terrain.
The 2025 Sierra 1500 AT4 also comes standard with monotube Rancho shock absorbers. These enable a smooth ride with jounce reduction, responsive suspension articulation, and heat dissipation, so you can stay outdoors longer doing what you love most: bounding over hill and dale. GMC wants its drivers well protected, which is why the Sierra 1500 AT4 comes standard with skid plates to protect the undercarriage, including the oil pan, transfer case, and differentials. Lastly, two red vertical front recovery hooks give you the added utility you need to make the most of your outdoor travels, lest a hiccup stall your excitement.
Capabilities
You have two engine options with the 2025 Sierra 1500 AT4, both of which are tuned for durability, strength, and smooth performance. There is the standard 3.0-liter Duramax Turbo-Diesel I-6 and the available 6.2-liter EcoTec3 V8. Both engines are excellent for getting you to your destination, accomplishing tough tasks, and hauling or towing cargo. The Duramax provides you with incredible low-end torque, which is ideal for trailering and rock-crawling, while the gas V8 provides you with greater horsepower for daily driving at higher speeds.
The Duramax six-cylinder makes 305 hp and 495 lb-ft of torque, giving you a lot of performance scalability for off-roading. This amount of torque is useful for hill-climbing, rock-crawling, and traversing undulating terrain. Features like Hill Descent Control also work well for coming down slopes or mountainsides. You can also reliably tow up to 8,800 lbs, which can cover large boats, campers, or cargo trailers. You can also carry up to 1,890 lbs in the bed box of a Sierra 1500 AT4 with the Duramax engine.
The gas V8 delivers 420 hp and 460 lb-ft of torque, giving you plenty of gusto for both off-the-line performance and top-end speeds, making it great for cruising and labor. When properly equipped, it can provide a max towing capacity of up to 8,900 lbs, so you get a touch more towing strength with the gas engine. You can also haul up to 1,820 lbs in the bed box, making this trim convenient for recreation, renovations, construction, and tradecraft.
Additionally, you have access to the highly popular MultiPro tailgate, which gives you six different tailgate functions to play with; these include upper and lower load-stop functionality, an inner gate that lowers for extended cargo, a raised work surface, a lower inner gate for easier bed box management, and an assist step for better reaching the bed box. You also have options like the available Kicker tailgate audio system, bed utility packages, and kits for organizing and securing your cargo.
Cabin Design
The 2025 Sierra 1500 AT4 isn’t just about ruggedness and performance; it also pampers you with luxury. The AT4 maintains the tradition of lavishing drivers and passengers alike with many great comfort and convenience features, which all starts with ten-way power front seats in perforated leather upholstery and emblazoned with an AT4 logo. You also have heated and ventilated front seats, with memory settings for the driver’s seat. Even the rear outboard seats have one-touch heating functionality.
If you want the cabin to maintain a certain temperature, the dual-zone automatic climate control allows for individual climate settings for the driver and passengers. You can also modify the climate via remote accessibility, which likewise allows for remote locking and unlocking, turning the running lamps on and off, and starting the engine. This ties in with the keyless open and start systems, so you can conveniently open up and get the vehicle going seamlessly and quickly.
The upscale interior is furnished with modern tech, including a 13.4-inch HD touchscreen featuring Apple CarPlay and Android Auto integration. You have the Google Built-In suite for maps, apps, a virtual assistant, and voice commands. You also have a wireless charging pad for your smartphone, a head-up display for eyes-on-the-road telemetry readouts, and a customizable 12.3-inch driver information center with direction, fuel, vehicle health, and temperature displays. Enjoy your favorite music or podcasts via SiriusXM satellite radio on the Bose Premium sound system, and stay connected on the go via the Wi-Fi hotspot.
Driver-accessible controls enable you to control the media from the leather-wrapped, heated steering wheel, while features like the in-vehicle trailering app let you manage and view cargo hitched to your truck. There is also the standard inclusion of the GMC Pro Safety suite, an array of driver assistance features for collision prevention, object avoidance, and travel support. Plus, you have the Teen Driver mode for after-drive report cards and pre-launch safety checks, so if your teen does get behind the wheel, you can ensure their safety. Additionally, OnStar’s connected emergency service access and navigation support add an extra level of security when traveling in the 2025 Sierra 1500 AT4.
Why Drivers Choose Us
Hardworking and customer-focused, Jim Ellis Buick GMC Mall of Georgia has catered to shoppers looking for great deals from a considerate and reputable dealership. With a history that dates back decades, we’ve continued our founder’s legacy of putting customers first with great service, clear communication, and amazing deals.
You’ll find new, used, and Certified Pre-Owned vehicles in our inventory, and we offer many ways to shop for what you want, including from the comfort of your home via our online portal. Our Express Way also makes it exceptionally easy to shop online for a great GMC; you can fill out and sign all of the paperwork electronically and take advantage of our home delivery. Alternatively, you can opt to shop with us in person by visiting our dealership and test-driving our wares firsthand.
You can also trade in your current vehicle with us for a convenient and easy valuation to help pay for your next purchase. Talk to our financial experts about how you can also secure great financing rates, or use our online payment calculator to figure out what the best financing options are for you. We tend to have incentives and rebates available, so there are plenty of ways to save. You can also keep your GMC truck running right by letting our certified technicians handle its regular maintenance, and you can shop for OEM parts to replace, repair, upgrade, or accessorize your ride.