2026 GMC Sierra 2500 HD vs. Sierra 3500 HD: Which Heavy-Duty Truck Is Right for You?

Shopping for a truck that can go the distance, tow the heaviest of loads, and has all the convenience features and amenities necessary to ensure that all your time on the road feels like a luxury experience? You'll love the new 2025 GMC Sierra HD. This truck has the safety features, power, and amenities to make life on the road luxurious, accommodating, and more convenient. The Options The new GMC Sierra HD is available in several trims: the PRO, the SLE, the SLT, the AT4, the Denali, the AT4X, and the Denali Ultimate. Drivers who want a truck that's the epitome of luxury and power will love the Denali Ultimate, the highest trim available with the most amenities and features. This trim includes all the Denali standard features plus customization options. It's equipped with a Duramax 6.6L Turbo-Diesel V8 engine with an Allison 10-speed automatic transmission, an available auxiliary trailer camera, an exclusive Alpine Umber interior, full grain leather seating, open pore Palsao wood finishes, and massage seats with 16-way power settings. It also has a Signature Vader chrome grille, 20-inch machined aluminum wheels, and illuminated power assist steps. The Advanced Trailering Technology Trailering and towing have never been easier thanks to the GMC Sierra HD's advanced trailering tech system. The ProGrade Trailing Tech consists of several intelligent technologies that will make hitching and towing heavy loads seamless and improve driver confidence and visibility throughout the process. It also has up to 14 different available camera views and adaptive cruise control with a trailering system that simplifies the towing process. The Driver Amenities When it comes to driver amenities, the new Sierra HD doesn't disappoint. Drivers can enjoy an added level of luxury and comfort in the 16-way power front seats that have massage capabilities, to make life on the road and even time in traffic feel stress-free. The interior is outfitted with top-of-the-line materials like full-grain leather. The Denali Ultimate trim even has unique laser edge topographical map patterns. These trucks also have best-in-class crew cab front head and legroom, ensuring that passengers of all heights can enjoy time spent in the front or back. The Technology These trucks have the latest in GMC vehicle technology and feature a 13.4-inch digital center tablet-style touchscreen that serves as the centerpiece of the cabin, a 15-inch diagonal multicolor head-up display that projects vehicle information onto the windshield, and a 12-inch diagonal color driver information center where you can access vehicle information. If you want a truck that knows no limits but also has an added level of luxury, you'll love everything about the new GMC Sierra HD lineup. Visit us today at Holloway GMC in Portsmouth, NH to see the new GMC Sierra HD models in person and begin the custom order process.

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.

As temperatures drop in Portsmouth, NH, many New England snowbirds are preparing to head south for the winter. Whether you're traveling to Florida, the Carolinas, or another warmer destination, making sure your vehicle is road-trip ready is essential. Before packing your bags, there's one important item at the top of your checklist: Are your tires ready for the journey? At Holloway GMC, we're here to help you navigate changing road conditions and find the perfect set of tires for wherever winter takes you. Winter Tires vs. All-Season Tires: What Should Snowbirds Choose? New Hampshire winters bring freezing temperatures, heavy snow, and icy roads. But if you're spending the colder months down south, do you really need winter tires? The best choice ultimately depends on your travel dates, destination, and the weather conditions you expect along the way: Winter Tires: Designed with specialized rubber to provide superior traction in cold, snowy, and icy conditions. They are highly beneficial if you are staying in NH well into late November or December when temperatures consistently fall below 45°F. All-Season Tires: Built for a variety of everyday driving conditions, including dry roads, rain, and light snow. They are often the most practical option for snowbirds who spend the bulk of the winter in warmer climates. All-Weather Tires: A great middle-ground. Many carry the Three-Peak Mountain Snowflake symbol, meaning they meet specific snow-traction standards while still performing beautifully in summer heat. Should You Drive South on Snow Tires? If you're leaving New Hampshire for a winter in sunny Florida, keeping your snow tires on throughout your road trip is not ideal. Winter tires use flexible rubber compounds engineered specifically for freezing weather. Driving on them for hundreds of miles in warmer southern climates will cause the tread to wear down rapidly, drastically shortening their lifespan. Before heading south, consider your departure date, how long you'll be away, and whether you'll return before the northern winter completely ends. Get Road-Trip Ready at Holloway GMC Not sure which tires make the most sense for your winter migration? The Certified Service team at Holloway GMC is here to help. We will inspect your current tread, check your alignment, and help you explore the best tire options suited to your vehicle and travel plans. Schedule your pre-trip inspection with Holloway GMC today, and drive south with total peace of mind! Fresh Start Tire Event: Buy 3 Tires, Get 1 for $1!* Planning to replace your tires before your winter getaway? Take advantage of the Fresh Start Tire Event at Holloway GMC! For a limited time, buy three select tires and get the fourth for just $1 with installation. Offer ends November 30, 2026. Additional limited-time offers are also available on select brake pads and rotors, shocks and struts, and tire pressure monitoring system sensors. Offer Details ¹ Offer ends 11/30/2026. Purchase and installation must be at a participating U.S. GM Dealer. See dealership for tire details. Highest- or equal-value tire will be $1. Maximum consumer purchase price of $450 per tire. Additional taxes and fees may apply. Offer subject to availability and may change at any time. Limit one offer per VIN. No other tire offers apply. ² Additional service offers end 11/30/2026. Purchase and installation must be at a participating U.S. GM Dealer. Rebate will be issued as a Visa® Gift Card. See mycertifiedservicerebates.com for details about how to claim the rebate, which must be submitted by 12/31/2026.