Experience the 2025 GMC HUMMER EV SUV

If you need a truck that can handle the jobsite by day and tackle rugged terrain on the weekend, you need to check out the 2026 GMC Sierra 2500 HD AT4. It blends heavy-duty performance with off-road hardware in a package that does not ask you to compromise. For drivers in Portsmouth, NH, this truck is a compelling option if you haul trailers, tow heavy loads, or simply want the confidence of knowing your truck can handle anything the road - or trail - throws at it. What Makes the 2026 GMC Sierra 2500 HD AT4 Built for Off-Road The AT4 trim is GMC's off-road-focused package, and on the Sierra 2500 HD, that means hardware designed to perform. The 2026 GMC Sierra 2500 HD AT4 comes equipped with a factory-installed 1.5-in suspension lift, skid plates to protect key underbody components, Multimatic® DSSV Dampers, Rancho® shocks, and an off-road-tuned chassis that gives you added ground clearance when the pavement ends. These aren't cosmetic upgrades - they are functional features that make a difference when terrain gets uneven or unpredictable. The AT4 also brings a locking rear differential and hill descent control, two features that are important when you are driving on loose gravel, steep grades, or through mud. Paired with all-terrain tires, the 2026 GMC Sierra 2500 HD AT4 is engineered to go further than a standard heavy-duty truck. Heavy-Duty GMC Truck Performance You Can Count On Beyond the off-road capabilities, this is still a heavy-duty GMC truck built to work. The Sierra 2500 HD is available with powerful engine options, including a 6,6 L Duramax® diesel that delivers 470 hp and 975 lb-ft of torque, the kind of torque serious towing and hauling demands. It has a max towing capacity of 20,000 lbs for conventional trailering and 21,390 lbs for gooseneck/fifth-wheel trailering. It has a max available payload of 3,524 lbs. Interior Comfort and Technology Capability does not mean you have to give up comfort. The AT4 interior brings a well-appointed cabin with heated and ventilated front seats, power front seats with massaging features, and a modern layout. The13.4-in touchscreen keeps navigation, audio, and vehicle settings easy to manage, and available connectivity features like wireless charging and a built-in Wi-Fi hotspot keep you linked to what's important. GMC Sierra 2500 HD AT4 features extend to driver assistance and safety technologies as well, including available camera systems that make hitching trailers and navigating tight spaces significantly easier. Why the 2026 GMC Sierra 2500 HD AT4 Belongs on Your Shortlist When you need a truck that does it all - off-road readiness, serious towing, and daily drivability - the 2026 GMC Sierra 2500 HD AT4 stands out from the crowd. It is a vehicle that earns respect on every kind of terrain. Stop by or visit us to explore the 2026 GMC Sierra 2500 HD AT4 and find the right configuration for your needs. The team at Holloway GMC is ready to help drivers throughout Portsmouth, NH find the heavy-duty truck that fits their lifestyle and gets the job done right.

Full-size trucks used to make you choose: serious capability outside or a genuinely comfortable place to spend a few hours inside. The 2026 GMC Sierra 1500 has largely erased that line. Its cabin can be configured as a straightforward work environment or loaded with leather, large digital displays, advanced trailering technology, and the sort of seats you'd happily settle into for a long interstate haul. For truck shoppers around Portsmouth, NH, the Sierra 1500 interior is a good example of just how far the modern pickup cabin has come. Big Screens Without Forgetting It's a Truck The available digital setup is substantial, with more than 40 diagonal inches of combined driver-focused displays when properly equipped. A 13.4-inch diagonal center touchscreen serves as the main infotainment interface, while available Google built-in compatibility brings supported navigation, voice assistance, and apps into the truck. The clever bit is that GMC hasn't forgotten physical usability in its pursuit of screen acreage. Controls and storage remain positioned for life in a pickup, giving drivers places for the phones, drinks, work gear, and assorted objects that inevitably migrate into a truck cabin. Sierra Seating Goes Well Beyond Basic Comfort Crew Cab models provide generous front headroom and legroom, but the more interesting story is how far GMC lets buyers take the seats themselves. Equipment varies considerably by trim, progressing from more straightforward cloth and leather-appointed configurations to available heated and ventilated seating in upper grades. AT4X and Denali Ultimate can be equipped with 16-way power front seats with massage functionality, a feature that sounds extravagant until you've spent several hours behind the wheel. Denali Ultimate pushes further with full-grain leather seating surfaces and detailed stitching, creating a cabin that is unmistakably upscale without pretending the vehicle outside isn't still a pickup. Each Trim Gives the Cabin a Different Character GMC hasn't simply changed upholstery colors and called them different interiors. Sierra trims develop noticeably different personalities as you move through the range. Elevation keeps things relatively clean and straightforward, while Denali introduces upscale materials and distinctive interior detailing. AT4 takes the cabin in a more rugged direction with its own trim treatment and Kalahari accents, while AT4X adds additional visual distinction befitting the more serious off-road hardware beneath it. Denali Ultimate sits at the other end of the spectrum, using premium materials and additional comfort equipment to create the most lavish Sierra 1500 interior of the bunch. Truck Technology That Earns Its Space Some technology looks impressive in a showroom and then spends most of its life untouched. Sierra's available trailering and camera systems are different because they address jobs pickup owners regularly perform. Up to 14 available camera views can provide additional perspectives around the truck and compatible trailer, helping with hitching, maneuvering, and positioning in confined areas. Available trailering technology can place relevant information within the vehicle's displays, while available Super Cruise® hands-free driver-assistance technology adds another dimension for compatible roads. Super Cruise® is standard on Denali Ultimate and available on Denali, giving long-distance drivers a feature that can become especially appealing after several hours of highway travel. Denali Ultimate Shows How Far a Pickup Cabin Can Go The Denali Ultimate is where GMC makes its strongest case that truck capability and luxury no longer occupy opposite ends of the showroom. Along with its full-grain leather and highly adjustable front seats, it features a 12-speaker Bose® Premium Series audio system with Centerpoint® surround sound and additional upscale cabin detailing. None of this increases payload or makes a trailer lighter, of course, but trucks spend plenty of their lives carrying people instead of lumber. Making those miles more comfortable isn't frivolous when the truck doubles as family transportation, a tow vehicle, and the thing you drive to work every morning. Explore the 2026 GMC Sierra 1500 in Portsmouth, NH The 2026 GMC Sierra 1500 interior can be configured for very different owners, from someone who wants a straightforward truck cabin to a driver looking for Denali Ultimate's leather, massage seating, premium audio, and advanced technology. Portsmouth-area shoppers can visit Holloway GMC to explore available new GMC Sierra 1500 inventory, compare Sierra trims and interior features, and see which cabin makes the most sense from the driver's seat. Schedule a test drive online to experience the Sierra 1500 before deciding which configuration belongs in your driveway.

If you are comparing the 2026 GMC Sierra 2500 HD vs. Sierra 3500 HD, both trucks deliver the power, durability, and towing capability GMC truck owners expect. The main difference comes down to capability: the Sierra 2500 HD provides impressive heavy-duty performance for work and recreation, while the Sierra 3500 HD is designed for drivers who need maximum towing and hauling strength. At Holloway GMC, drivers can compare GMC Sierra HD trucks and find the model that best fits their towing needs, work requirements, and lifestyle. GMC Sierra 2500 HD vs. Sierra 3500 HD: Key Differences The 2026 GMC Sierra 2500 HD and Sierra 3500 HD share many features, including powerful engine options, advanced towing technology, premium interiors, and professional-grade capability. The biggest difference is how much capability you need. The GMC Sierra 2500 HD is a great choice for: Towing campers, boats, and trailers Work and recreational use Drivers who need heavy-duty capability with everyday comfort The GMC Sierra 3500 HD is designed for: Larger fifth-wheel trailers Heavy-duty towing applications Maximum payload requirements Drivers who regularly handle demanding jobs 2026 GMC Sierra 2500 HD: Versatile Heavy-Duty Capability The 2026 GMC Sierra 2500 HD offers the strength needed for many towing and hauling tasks while maintaining the comfort and versatility drivers want from a daily truck. It is ideal for customers who need a capable pickup for: Weekend adventures Equipment hauling Towing recreational vehicles Professional work applications For many drivers, the Sierra 2500 HD provides the right balance of performance, comfort, and capability. 2026 GMC Sierra 3500 HD: Maximum Strength for Heavy-Duty Jobs The 2026 GMC Sierra 3500 HD is built for drivers who need additional capability beyond what a typical heavy-duty truck provides. With increased towing and hauling strength, the Sierra 3500 HD is a strong option for customers who regularly tow heavy trailers, fifth-wheel campers, or large equipment. If your truck is used for the toughest jobs, the Sierra 3500 HD provides the extra capability you need. GMC Sierra 2500 HD vs. Sierra 3500 HD Comparison Feature GMC Sierra 2500 HD GMC Sierra 3500 HD Best For Heavy-duty versatility Maximum towing capability Ideal Driver Work, recreation, towing Heavy-duty and commercial use Strength Powerful towing performance Increased hauling capability Driving Style Everyday truck with heavy-duty power Built for demanding workloads Which GMC Sierra HD Truck Should You Choose? The right choice depends on how you use your truck. Choose the 2026 GMC Sierra 2500 HD if you want a truck that offers: Strong towing capability Everyday comfort Versatility for work and recreation Choose the 2026 GMC Sierra 3500 HD if you need: Maximum towing performance Greater hauling capability A truck built for the heaviest jobs Visit Holloway GMC to compare available Sierra HD trucks and find the GMC pickup that fits your needs. Frequently Asked Questions What is the difference between the GMC Sierra 2500 HD and Sierra 3500 HD? The main difference is capability. The Sierra 3500 HD is designed for higher towing and payload demands, while the Sierra 2500 HD provides excellent heavy-duty performance for many work and recreational needs. Is the GMC Sierra 3500 HD better for towing? The Sierra 3500 HD is the better choice for customers who frequently tow heavy trailers, fifth-wheel campers, or large loads. The Sierra 2500 HD is a great option for many everyday towing needs. Should I buy a GMC Sierra 2500 HD or Sierra 3500 HD? The best choice depends on your needs. The Sierra 2500 HD is ideal for drivers who want a balance of capability and comfort, while the Sierra 3500 HD is designed for maximum towing and hauling performance.