Here at Tim's Truck Capital, we're always ready to serve the communities around Concord, NH, especially when they need a heavy-duty work truck. One example of a truck built for big jobs is the GMC Sierra 2500HD AT4, which tows 20,000+ pounds when properly equipped. Whether you are a current GMC driver or have been wanting to make the switch, we will be here to walk you through the truck-buying process and break down what makes the GMC Sierra 2500HD AT4 the perfect choice for those who want to push the limits. Stay tuned!
The GMC Sierra 2500HD AT4 is the Ultimate Work Truck
There are countless reasons why the GMC Sierra 2500HD AT4 is the ultimate work truck, and Tim's Truck Capital is here to share those with you today. One reason is that the Sierra 2500HD AT4 includes features like Rancho shocks, skid plates, and an Eaton locking rear differential, making it ideal for construction sites, off-road driving, and hauling. You also want to note the GMC Sierra 2500HD AT4 can tow over 20,000 pounds, with max gooseneck/fifth-wheel ratings up to 21,190 pounds.
If you're shopping for a powerful truck near Concord, NH, the Sierra 2500HD AT4 is the perfect option.
What are the Engine Options for the GMC Sierra 2500HD AT4?
The GMC Sierra 2500HD AT4 offers two main engine options, both paired with an Allison 10-speed automatic transmission. These include a standard 401-horsepower 6.6-liter V8 gas engine (464 pound-feet of torque) and an available 470-horsepower 6.6-liter Duramax Turbo-Diesel V8 (975 pound-feet of torque).
Between the two, the diesel option boasts better towing, with up to 21,190 pounds when properly equipped. That should be enough for your biggest job, and if it's not, Tim's Truck Capital is ready to explore other options near Concord, NH.
Towing Figures for the GMC Sierra 2500HD AT4
Below, we want to break down the available towing figures for this popular heavy-duty work truck. One thing to note, however, is that depending on the model year, these could be different.
Key Towing & Performance Specs
- Maximum Towing (Diesel): Up to 21,130 pounds - 21,300 pounds.
- Maximum Towing (Gas): Around 14,500 - 16,000 pounds, depending on configuration.
- Gooseneck/Fifth-Wheel: Up to 22,390 pounds (regular cab) or roughly 22,070 pounds (crew cab).
Explore the Advanced Trailering Technology of the 2500HD AT4
In addition to this work truck boasting a powerful engine and towing into the 20,000s, it is worth covering how this happens. Newer editions of this model have an advanced suite of towing technology designed for heavy-duty capability, including up to 14 camera views (like Transparent Trailer), an in-vehicle trailering app, and 21,190 pounds of towing capacity (~22,500 with diesel vehicles).
What Off-Road Features Does the GMC Sierra 2500HD AT4 Have?
One reason why the GMC Sierra 2500HD AT4 is perfect for off-road conditions is its design. This truck is made for off-road terrain, thanks to features like Rancho® monotube shocks and 18- to 20-inch wheels with all-terrain tires.
Here are some other things to note:
- Eaton® automatic locking rear differential
- A 2-speed Autotrac transfer case
- Recovery hooks
- Skid plates
These factors all affect your everyday driving and towing experience, especially when your Sierra is off the road and in the dirt, on rocks, or beyond. If you want to explore the off-road capabilities of this specific pickup, our team near Concord, NH, is more than ready to get you a set of keys.
What Exterior Design Features Can I Expect with the GMC Sierra 2500HD AT4?
Because the GMC Sierra 2500HD AT4 is designed to adventure beyond the beaten path, you can expect heavy-duty exterior elements and design features. This specific trim features a distinctive black-chrome grille, signature red vertical recovery hooks, and a 1.5-inch factory-installed suspension lift. You can't miss this truck on (or off) the road ahead, and it is big enough to feel in command while you're behind the wheel.
Other features outside this truck include 20-inch gloss black aluminum wheels with all-terrain tires, Rancho twin-tube shocks, underbody skid plates, and the versatile MultiPro Tailgate, to name a few.
Note: Depending on the model year, exterior features will vary. Make sure to inquire about specific features with our local team at Tim's Truck Capital.
Exploring the Dimensions of the GMC Sierra 2500HD AT4
The dimensions of the GMC Sierra 2500HD AT4 are another topic we want to clarify in this breakdown, with this truck falling into the full-size, heavy-duty category. Not only does this truck weigh a whopping 6,900-8,000 pounds (depending on engine), but it also measures:
- Overall Length: ~250.8 inches
- Overall Width (without mirrors): 81.9 inches
- Overall Height: 79.8 inches
- Wheelbase: ~159 inches
- Ground Clearance: 10.1 inches
Cargo Bed Dimensions
- Cargo Box Length at Floor: 82.2 inches
- Cargo Box Width at Floor: 71.4 inches
- Cargo Box Width at Wheelhousings: 51.9 inches
- Cargo Box Height: 21.0 inches
How Comfortable is the GMC Sierra 2500HD AT4?
Because the GMC Sierra HD2500 AT4 is considered a luxury-leaning truck on the market, you can bet on a comfortable driving and riding experience. Thanks to its leather-appointed seating, heated/ventilated front seats, and a heated steering wheel, you never have to worry about missing out on the finer things in this trim, plus the AT4 offers you best-in-class front legroom, spacious rear seating, and advanced tech like a 13.4-inch infotainment system.
Interior dimensions for this heavy-duty pickup are:
- Front Headroom: 43.03 inches
- Front Legroom: 44.53 inches
- Rear Headroom: 40.12 inches
- Rear Legroom: 43.40 inches
- Front Shoulder Room: 66.02 inches
- Rear Shoulder Room: 65.30 inches
Standard seating in this truck will be 5 or 6 (depending on the center console configuration), which is also something to remember.
Is the GMC Sierra 2500HD AT4 Safe?
Yes, the GMC Sierra 2500HD AT4 is largely considered a safe truck on and off the road. Thanks to its standard GMC Pro Safety suite (automatic emergency braking, forward collision alert, lane departure warning), you can drive with additional assistance from your vehicle. Bigger trucks can be safer in the event of an accident, although rollover risk can be greater if mishandled. It is always a good idea to refer to your owner's manual for safety-related questions.
We also want to note that larger trucks, including the GMC Sierra 2500HD AT4, are not formally tested by agencies such as NHTSA or IIHS.
- Additional Safety: The AT4 trim can be equipped with enhanced safety features like HD Surround Vision, Trailer Side Blind Zone Alert, and a Rear Camera Mirror.
What are the Bed Configurations on the GMC Sierra 2500HD AT4?
The 2024–2026 GMC Sierra 2500HD AT4 is available as a 4WD Crew Cab. This not only means a larger truck for you and your passengers, but also more available cargo for large loads you may need to transport. This trim offers two main bed lengths: a 6'9" Standard Bed (82.25 inches) and an 8' Long Bed (98.27 inches).
Cargo space in the GMC Sierra 2500HD AT4 is 83.5 cubic feet with the long bed or 69.5 cubic feet with the standard bed. This is generous and ideal for those using this truck to haul long or short distances.
Is the GMC Sierra 2500HD AT4 Worth Buying in Concord, NH?
Yes, many truck drivers agree the GMC Sierra 2500HD AT4 is worth the purchase, especially in New Hampshire. Because you get all four seasons in this part of the country, your truck needs to be able to handle the storm. The GMC Sierra 2500HD AT4 is ready for all weather conditions thanks to its 4WD system with a 2-speed AutoTrac transfer case, specialized off-road suspension with Rancho® shocks, and the advanced Traction Select System. Whether it's a snowstorm, ice on the road, a rainstorm, or you're off-roading in the summer months, the 2500HD AT4 is a beast.
How Much Does a Used GMC Sierra 2500HD AT4 Cost near Concord, NH?
Although prices for a pre-owned GMC Sierra 2500HD AT4 can vary based on condition, mileage, and added features, the local average sits between $53,500 to over $71,000. This is something our team at Tim's Truck Capital can help you with on-site, and we're always receiving inventory to test-drive and buy on our lot near Concord, NH. The best way to find out what the pricing is for the truck you're interested in is to reach out to our sales team.
Test Drive the GMC Sierra 2500HD AT4 Today at Tim's Truck Capital
As soon as you are ready to test drive the GMC Sierra 2500HD AT4 near Concord, NH, let Tim's Truck Capital be your first stop. We have inventory that is waiting for you here at our dealership, and we are award-winning for customer service and experience. A work truck needs to check off all the boxes of your everyday life on and off the road, and our sales team will be here to make sure this happens. Let's find you a truck today!