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The 2026 GMC Sierra 2500 HD offers unmatched capability and comfort. If you are hauling equipment on a job site or towing a weekend trailer, this truck handles it with ease. Drivers near Old Saybrook, CT, seeking a hard-working pickup should contact Vachon Buick GMC today to explore their options. Here is a breakdown of what the 2026 Sierra 2500 HD provides. Trim Levels and Configurations The 2026 GMC Sierra 2500 HD features several trims, including the Pro, SLE, SLT, AT4, Denali, and Denali Ultimate. Entry-level trims provide a capable work truck, while higher trims like the Denali add premium interior materials and advanced technology. The AT4 trim suits drivers looking to go off-road, offering purpose-built hardware for rugged terrain. more Powertrain Options Built for Work Buyers can choose between a 6.6-L V8 gas engine or an available 6.6-L Duramax turbo-diesel V8. Drivers prioritizing towing performance and torque often choose the diesel option. Both engines pair with a heavy-duty automatic transmission designed for serious work. These engines easily move heavy loads. Technology and Interior Comfort Higher trims feature a large touchscreen infotainment system with wireless Apple CarPlay© and Android Auto© compatibility. Available features include a built-in Wi-Fi hotspot, a head-up display, and MultiPro tailgate functionality for expanded truck bed access. Available leather seating, heated and ventilated front seats, and a heated steering wheel make long drives more comfortable. Safety and Driver Assistance Features Available safety systems include forward collision alert, automatic emergency braking, lane keep assist, and rear cross-traffic alert. The available Super Cruise hands-free driving assistance system stands out for long highway hauls. Multiple camera views and available trailer camera integration make maneuvering this large truck simple and safe. AT4 and Denali: Two Distinct Directions The Sierra 2500 HD AT4 focuses on off-road performance, offering a factory-lifted suspension, skid plates, and all-terrain tires. The Denali trim leans into luxury with premium leather, a signature chrome grille, and additional comfort upgrades. Both trims showcase the versatility of the 2026 GMC Sierra 2500 HD. Find Your 2026 GMC Sierra 2500 HD Today The 2026 GMC Sierra 2500 HD works as hard as you do. With capable powertrain options and a thoughtfully designed interior, this vehicle warrants an in-person look. Stop by Vachon Buick GMC in Old Saybrook, CT, to browse our inventory and find the perfect trim. Our team is ready to help you get behind the wheel today.

Noticing something off with your vehicle's brakes can be unsettling, and it's one of those situations where acting quickly really matters. These FAQs about brakes will let us walk you through the steps you should take when your brakes start acting up. Whether it's a strange noise, a mushy pedal, or a pull to one side, drivers in Old Saybrook, Connecticut can use these FAQs as a practical starting point. Is What I’m Experiencing Actually a Brake Problem? The first step is simply identifying whether you have a real concern or if it’s about your brakes at all. Common warning signs that your brakes need help include squealing when you slow down, a grinding noise, a vibration in the pedal, or if your vehicle pulls to one side during braking. A soft or spongy pedal feel is another signal that something may need attention. And of course, if the dreaded brake warning light has come on, that's a clear sign to take action sooner rather than later. more What Should I Do Immediately After Noticing a Problem? Once you notice a potential brake issue, avoid aggressive driving. Maintain more following distance than usual and try to minimize hard stops. If the pedal feels unusually low or the vehicle is pulling strongly to one side, it's best to avoid highway driving until the problem is diagnosed. Brakes squealing consistently—not just when cold or wet—is a reliable sign that the pads may be worn and need professional inspection. Should I Try to Diagnose It Myself? A quick visual check can be helpful. Through most wheel spokes, you can see the brake rotor and sometimes the caliper. If the rotor looks deeply grooved or scored, that's a sign of wear. However, most brake issues require a lift and a trained eye. Trying to assess brake pad thickness or caliper function on your own without proper tools can lead to missed problems. This brakes FAQ recommendation: Don't guess. Get it checked. When Should I Schedule a Service Appointment? Schedule a service visit right away if you notice any combination of these warning signs: consistent brakes squealing, grinding noises, pedal pulsation, longer stopping distances, or dashboard warning lights. You don't need to wait until the situation gets worse. In fact, catching brake wear early often means a simpler and less expensive repair. Waiting too long can turn a straightforward pad replacement into a full rotor replacement. What Can I Expect During a Brake Inspection? A trained technician will typically check pad thickness, rotor condition, brake fluid level, caliper function, and brake lines. They'll also test the pedal feel and inspect for any leaks in the hydraulic system. After the inspection, you'll receive a clear picture of what needs attention and what can wait. Certified service technicians are equipped to handle everything from a simple pad swap to a full brake system service. Visit Us at Vachon Buick GMC for Your Next Brake Service If you've been running through this brakes FAQ and checking off warning signs, it's time to get your vehicle looked at by a professional. Our service team at Vachon Buick GMC is here to help drivers throughout Old Saybrook, CT keep their vehicles safe and running smoothly. Stop by or schedule a service appointment today—your brakes are too important to wait on. Final Thoughts on This Brakes FAQ Brake concerns don't always mean a major repair, but they do always deserve attention. By following the steps in this brakes FAQ—identifying the symptoms, adjusting your driving, skipping the guesswork, and scheduling service promptly—you give yourself the best chance of staying safe and avoiding bigger problems down the road. When in doubt, trust a certified technician to guide you through the next steps.

When you see your GMC's oil light come on, it can be a stressful moment. The good news is that knowing what steps to take can make all the difference for your engine's health and your safety on the road. What the Oil Light Actually Means When your oil light on your GMC's dashboard comes on, it typically signals that your engine's oil pressure has dropped below a safe level. This does not always mean you are completely out of oil, but it does mean something needs your attention right away. Low oil pressure can result from a low oil level, a failing oil pump, or a leak - all of which can cause serious engine damage if ignored. This is important oil light info to keep in mind: the oil pressure warning light is different from the oil life monitor. One tells you about pressure, the other tells you when it is time for a routine oil change. Do not confuse the two. more Step 1 - Pull Over Safely and Turn Off the Engine The moment you notice your oil light is blinking, find a safe place to pull off the road as soon as possible. Do not continue driving while the light is on, even if the vehicle seems to be running normally. Once you are safely stopped, turn off the engine to prevent further damage. Running an engine with low oil pressure - even briefly - can cause significant internal wear. Step 2 - Check Your Oil Level After giving the engine a few minutes to cool down, open the hood and locate the dipstick. Pull it out, wipe it clean with a cloth, reinsert it fully, and pull it out again to get an accurate reading. If the oil level is low, adding the correct oil type for your GMC model may resolve the issue temporarily. Your owner's manual will specify the right viscosity and grade. Step 3 - Look for Obvious Leaks or Smoke With the engine off, take a quick visual look under the vehicle and around the engine bay. A visible oil puddle beneath the car or smoke coming from the engine area can point to a more serious problem. If you notice either of these signs after your oil light on warning appeared, do not attempt to restart the vehicle. Call for roadside assistance instead. Step 4 - Do Not Restart If the Problem Persists If you have checked the oil level and it appears fine, but the oil light on your dashboard remains lit after restarting, shut the engine back off immediately. A normal oil level with a lit warning light often points to an oil pressure issue - which requires professional diagnosis. Continuing to drive in this condition can lead to costly engine damage. Visit a GMC Certified Service Center Once your vehicle is stable, it is time to schedule a service appointment. Drivers in Old Saybrook, CT can trust the factory-trained technicians at Vachon Buick GMC to properly diagnose and address whatever triggered the oil warning. No matter if the issue is a simple top-off, a leak repair, or an oil pump inspection, having a professional handle it ensures your GMC stays in peak condition.

The Sierra trims lineup does not feel random. Each trim has a clear role, almost like a tool designed for a specific job. Some focus on durability. Others lean into long-distance comfort. A few are built to leave the pavement behind without hesitation. For drivers in Old Saybrook, CT, that structure makes choosing Sierra trims easier once you understand how each version works in daily use. Pro Trim and Essential Worksite Strength The Pro trim sets the baseline with purpose. The TurboMax™ engine produces 310 hp and 430 lbs. ft. of torque, paired with an 8-speed automatic transmission. Power delivery is steady, suited to hauling and consistent daily work. The bed includes 12 cargo tie-downs, giving you flexibility when securing equipment. Interior materials are built to handle wear, which matters over time. You can step up to a 5.3L V8 or add the Graphite Edition for a more defined look without changing its core function. SLE Trim and Integrated Technology Upgrade SLE introduces a more complete cabin. A 13.4-inch touchscreen and 12.3-inch driver display bring clear information into view. Heated front seats improve comfort during colder months in Connecticut. An auto-locking rear differential improves traction when surfaces shift. The available Duramax® 3.0L Turbo-Diesel adds strong low-end pull, which suits towing and longer highway drives. Elevation Trim and Distinct Exterior Identity Elevation focuses on design without losing function. Gloss-black accents and 20-inch aluminum wheels give it a sharper presence. LED fog lamps improve visibility in low-light conditions. Inside, leather-appointed seating adds a layer of refinement. Optional features like wireless charging and a power sunroof extend convenience without changing the truck’s overall intent. It feels more personal, less purely utilitarian. SLT Trim and Everyday Premium Capability SLT builds on that foundation with more refinement. The 5.3L V8 paired with a 10-speed automatic transmission delivers 355 hp and 383 lbs. ft. of torque. It moves with confidence, especially under load. Chrome exterior details and upgraded interior materials shift the experience toward comfort. The available Duramax® diesel and ProGrade Trailering System® make towing more controlled, with tools that help you monitor and adjust as needed. AT4 Trim and Off-Road Control Systems AT4 is designed for uneven terrain. A factory 2-inch lift increases ground clearance. Rancho® monotube shocks and skid plates protect key components when surfaces become rough. The Autotrac® 2-speed transfer case and all-terrain tires maintain traction across dirt, gravel, and mud. Inside, the Jet Black and Kalahari interior gives it a distinct character without losing durability. The available 6.2L V8 adds stronger output for more demanding conditions. Denali Trim and Advanced Interior Refinement Denali shifts toward precision and comfort. Materials change noticeably, with wood and aluminum accents throughout the cabin. Perforated leather seating improves long-distance comfort. Super Cruise® allows hands-free driving on compatible highways, reducing fatigue on extended trips. A Bose Premium sound system adds clarity to the cabin environment. This trim focuses on how the truck feels over hours, not minutes. Denali Ultimate Trim and Maximum Feature Integration Denali Ultimate pushes further into detail. Vader Chrome accents, 22-inch wheels, and upgraded interior finishes set it apart visually. Massaging front seats and additional technology features create a more relaxed driving experience. It is built for drivers who spend significant time on the road and expect consistency in comfort and control. Walk through each of the 7 Sierra trims and the differences become clear quickly. Visit Vachon Buick GMC to compare them in person. The right configuration tends to stand out once you match it to how you use your truck each day.

The 2026 GMC Sierra 1500 focuses on doing important things well. Strong towing. Smart technology. A cabin that feels worth spending time in. For drivers in Old Saybrook, CT, that balance is what makes this truck stand out. Technology That Actually Helps You Drive GMC didn’t add features just to list them. The available Super Cruise® system is a good example. Hands-free driving on compatible highways makes long trips easier, especially when towing or covering distance regularly. more The available 14 camera views are just as practical. Hitching a trailer, backing into a tight space, or checking your surroundings becomes much more controlled. You’re not guessing. You’re seeing everything clearly. Inside, the available 40 inches of combined digital displays are clean and easy to use. Navigation, trailering info, and vehicle data all sit where you expect them. 2026 GMC Sierra 1500 Powertrain Options The Sierra 1500 gives you real choices depending on how you use your truck. The TurboMax™ engine delivers 310 hp and 430 lbs. ft. of torque, which is more than enough for daily work and towing needs. It’s responsive and efficient for a truck in this class. If towing is a priority, the available Duramax 3.0L Turbo-Diesel stands out. It offers strong low-end torque and a max towing capacity of up to 13,300 lbs. when properly equipped. It’s a setup built for consistency over long hauls. Towing Confidence Comes Standard The ProGrade™ Trailering System helps simplify the process with integrated tools that guide you through hitching, monitoring, and managing your trailer. Add in the camera system and available trailering tech, and the Sierra makes heavy loads feel more manageable. For boat owners and trailer users around Old Saybrook, that’s where this truck earns its value. Interior That Feels Like an Upgrade Step inside and the difference is clear. The Sierra 1500 focuses on space, comfort, and materials that hold up over time. The Crew Cab offers strong headroom and legroom, giving both driver and passengers space to settle in. Available features like heated and ventilated seats, premium leather, and a Bose sound system make long drives more comfortable. 2026 GMC Sierra 1500 Trims The Pro is built for straightforward work use. The SLT adds comfort and upgraded materials. AT4 and AT4X bring off-road capability with real hardware like skid plates and advanced suspension setups. Denali and Denali Ultimate focus on refinement, adding premium finishes and advanced technology. You’re not just picking a trim. You’re picking how you plan to use the truck. The 2026 GMC Sierra 1500 works because it doesn’t overcomplicate things. It delivers capability, useful technology, and comfort in a way that feels intentional. Visit Vachon Buick GMC and take a closer look. It’s the kind of truck that makes sense the moment you start using it.

Unveiling the 2026 GMC HUMMER EV Vachon Buick GMC in Old Saybrook, CT is proud to unleash the 2026 GMC HUMMER EV, a mechanical predator that completely shatters every single boundary of the electric vehicle universe. This all-electric powerhouse is available as both a pickup truck and an SUV, combining technology that feels like it was stolen from the future with a level of off-road violence that is simply unparalleled. If you are navigating the coastal roads of Old Saybrook, CT or hunting for a brutal summer adventure, the HUMMER EV provides a level of dominance that makes other vehicles look like toys. This is the absolute peak of automotive engineering, and it is ready to consume the road. Unmatched Performance in the 2026 GMC HUMMER EV Long-Range Capability The 2026 GMC HUMMER EV is a long-distance champion that refuses to quit. The 3X pickup configuration equipped with the 24-module battery delivers a staggering 381 miles of range, which means you can hunt for adventure across state lines without a single moment of hesitation. This vehicle is a marathon runner with the heart of a sprinter. If you plan a massive summer road trip, the HUMMER EV grants you the ultimate freedom to roam the world while leaving a zero-emission footprint in your wake. High Horsepower and Off-Road Dominance This machine is a literal titan. The 3-motor setup on the 3X trim generates a terrifying 1,000 hp in the pickup and 830 hp in the SUV, providing enough raw energy to warp your perception of speed. The torque is even more insane, peaking at 11,500 lb-ft to ensure you are pinned to your seat while the world becomes a blur. You get the legendary CrabWalk© mode that allows the vehicle to move diagonally and Extract Mode© to lift the suspension by 6", ensuring that no rock or sand dune can stand in your way. The Extreme Off-Road package adds 18" wheels wrapped in massive 35" tires, creating a footprint that commands respect from the dirt itself. Luxury and Technology Redefined Premium Interiors The 2026 GMC HUMMER EV does not just conquer the outdoors, it provides a 1st class sanctuary of pure luxury. The interior is a masterpiece of high-quality materials and massive space, making it the ultimate throne for your daily commute or a cross-country haul. The SUV variant offers incredible versatility for families who demand power, providing enough cargo room to carry every piece of gear you could ever imagine for a summer escape. Innovative Features The cockpit is a digital command center that puts the world at your fingertips. You are greeted by a massive 13.4" infotainment touchscreen and a 12.3" driver information center that deliver data with surgical precision. Integration is flawless with Apple CarPlay© and Android Auto©, keeping your world connected while you leave civilization behind. You can also engage Super Cruise©, the premier hands-free driving technology that allows you to relax on compatible highways while the vehicle handles the heavy lifting through Old Saybrook or beyond. Unique Editions for Every Driver The lineup is built to satisfy your deepest desires for power and style. The EV2X serves as the entry point with 570 hp and 7,400 lb-ft of torque. The EV3X is the true apex predator with its 1,000 hp potential. For the most elite drivers, the Omega Edition features a breathtaking Neptune Blue Matte exterior and exclusive 18" gloss black beadlock-capable wheels. These models are the gold standard of electric performance, and they are ready to transform your entire summer experience. Claim Your Throne at Vachon Buick GMC The time for waiting is over because the 2026 GMC HUMMER EV is waiting to be tamed at Vachon Buick GMC in Old Saybrook, CT. You need to feel the 1,000 hp surge through your veins and witness the sheer scale of the 13.4" display in person. Visit us today to schedule a test drive that will change your life and secure your spot in the future of electric dominance. The 2026 GMC HUMMER EV is not just a car, it is a declaration of total independence and raw, unadulterated power. With its massive electric range, earth-shaking torque, and a cabin that pampers you in total luxury, it is the only choice for anyone who wants to own the summer in Old Saybrook, CT. You are looking at a piece of automotive history that refuses to compromise on anything. Vachon Buick GMC in Old Saybrook, CT is your destination to experience this revolution, so do not let this opportunity pass you by.

When it comes to mid-size SUVs, the 2026 GMC Acadia is a masterclass in interior design and comfort. This vehicle effortlessly combines spacious seating, cutting-edge technology, and luxurious features to create a driving and riding experience like no other. For Old Saybrook, Connecticut drivers and families, the 2026 GMC Acadia promises comfortable interior accommodations to make every journey first-class. Spacious Seating to Fit Your Life The 2026 GMC Acadia offers seating for up to 8 passengers, making it perfect for families and group adventures. For Old Saybrook drivers who need exceptional versatility, the Acadia’s 3 rows of seating can be easily adjusted for up to 97.5 cu. ft. of cargo space. The 2nd-row One-Touch folding seats and 3rd-row power-folding options allow quick and easy reconfiguration, ensuring you always have the space you need. Passengers will appreciate high-quality materials, durability and sophistication. The Denali Ultimate trim indulges you with exclusive Woodland Mahogany full-grain leather seating. No matter where you're seated, the Acadia ensures everyone enjoys a comfortable ride. more Cutting-Edge Technology at Your Fingertips GMC has integrated advanced technology into the 2026 Acadia to enhance both convenience and entertainment. At the heart of the interior is the 15” diagonal Premium GMC Infotainment System. The vibrant touchscreen provides wireless smartphone and Google built-in compatibility, as well as voice-activated controls, allowing you to focus on the road while staying connected. Drivers in Old Saybrook, Connecticut, will also benefit from the available 8” diagonal configurable Head-Up Display, which projects essential information directly onto the windshield. Combine this with the 9 camera views, including HD Surround Vision and a Rear Camera Mirror, and you have a system designed to make every drive safer and more intuitive. Premium Features for Ultimate Comfort The 2026 GMC Acadia interior comfort extends beyond seating and technology to include thoughtful details that elevate the overall experience. The Denali and Denali Ultimate trims feature heated and ventilated front seats, perfect for tackling Connecticut’s varying weather. Additionally, the panoramic sunroof available on certain trims allows passengers to enjoy wide-open vistas, bringing natural light and fresh air into the cabin. Storage is another highlight, with up to 97.5 cu. ft. of cargo space when the rear seats are folded down. The hands-free AutoSense Power Liftgate makes loading and unloading effortless, especially when your hands are full. These features ensure that the Acadia isn't just a luxurious SUV but also a highly practical one. See the 2026 GMC Acadia Interior in Old Saybrook, CT Ready to experience the 2026 GMC Acadia interior comfort for yourself? Visit Vachon Buick GMC in Old Saybrook, CT, to explore this exceptional mid-size SUV in person. Contact us today or visit our website at checkvachonbuickgmc.com to learn more and schedule your test drive. Experience Comfort Like Never Before with the 2026 GMC Acadia The 2026 GMC Acadia is designed to impress from the moment you step inside. With its spacious seating, advanced technology, and premium features, it redefines what it means to drive in comfort. Whether you're navigating through Old Saybrook, CT, or venturing further afield, the GMC Acadia ensures that every journey is as enjoyable as the destination. Don't wait—explore the 2026 GMC Acadia interior comfort and experience the difference today!

The 2025 GMC Sierra EV Denali has performance features, charging capabilities, and driver amenities and convenience features that set it apart from other vehicles in its class. If you're shopping for an electric light-duty pickup truck that can go the distance, you can end your search with this one. Four Reasons to Explore the 2025 GMC Sierra EV Denali 1. The Luxurious Interior True to the Denali name, this truck has luxurious features that will transform and elevate your driving experience. It has a panoramic fixed glass roof that lets in the natural light, ambient interior lighting, a leather-wrapped steering wheel, and an air filtration system. It also comes with a Bose premium seven-speaker audio system. more 2. The Exterior Design Features This pickup truck was built with the driver's ultimate convenience in mind. Not only does it have design accents that make it stand out, like the unique front grille, the illuminated GMC front badging, the animated lighting, and the gloss black accents, but it also has a MultiPro Tailgate. This tailgate has six total functions that allow for easy access to the back and convenient loading and unloading and features cargo bed lighting. It also has an eTrunk that provides an extra 11 ft.³ of lockable and weatherproof storage space. The MultiPro Midgate enables the truck bed to accommodate items up to 10'10" in length. 3. The Tech Features and Electric Power This truck has Super Cruise driver assistance technology that allows for a hands-free driving experience. Plus, when properly equipped, it can power your home in a blackout for up to 21 days. It also has a 14-inch diagonal multicolor head-up display that projects important vehicle information onto the windshield to prevent distracted driving. It also features a WiFi hotspot and OnStar services. 4. The Capabilities Drivers interested in this electric truck can choose from the Extended Range Denali that gets a max range of 390 miles and the Max Range Denali trim that has a 460-mile range. Not only does this vehicle run on electric power, but it's also a capable truck that can go the distance and tow heavy loads. It has 760 hp, 785 pound-feet of torque, and can tow up to 10,000 pounds. Its 4-Wheel Steer system ensures an optimal turning radius and exceptional vehicle maneuverability. It also has the CrabWalk feature, which allows it to drive at a diagonal angle at low speeds. The Air Ride Adaptive Suspension ensures the most comfortable driving experience for the driver and passenger and allows drivers to raise and lower the vehicle height as needed. When you visit our dealership, you can test drive the new GMC Sierra EV Denali and experience all its power and performance features in person. Contact Vachon Buick GMC in Old Saybrook, CT, to learn more about our new vehicle offers and incentives.

If you set the 2025 GMC Sierra 1500 a task, then it's going to excel at it. It has brute strength, fantastic modern technology, and a range of engines that let you find the right one for you. Both its towing and payload capacities are also great, with the towing capacity in particular beating out some close competitors. Tows Better Than Competitors The Sierra 1500 can be configured in a lot of different ways. The towing capacity varies depending on the configuration you buy. However, its strongest configuration, towing 13,200 pounds, is hard to beat strength-wise. It out-tows many of its closest competitors. If you want that top towing capacity, then make sure you get a Double Cab model with 2WD, 20-inch wheels, the Max Trailering Package, and the available diesel engine. more It Can Carry Your Cargo With a maximum payload capacity of 2,530 pounds, the GMC Sierra 1500 is also highly capable of getting a lot of equipment from place to place in the truck bed. The maximum payload capacity does vary based on the truck's configuration, so make sure you're careful and ask questions while deciding what model you want. If you're only interested in the base model, for example, you'll be getting a truck with a maximum towing capacity of 2,204 pounds. It Can Make Sure You're Comfortable If you plan on spending long hours driving your Sierra 1500, then you may want to consider equipping some of the great comfort options, including a 10-way power-adjustable driver's seat. This replaces a 4-way manually adjustable seat, allowing for more precise control over how your seat is positioned. There are lots of other upgrades you might like, including a memory function to save your favorite seat position, a heated steering wheel, and heated seats. It Can Help You Stay Safer The Sierra 1500 has a lot of driver assistance technology, including available Super Cruise, which lets you let go of the wheel on certain roads. The truck's standard driver assistance and safety features include a rear vision camera, an HD surround vision camera, forward collision alert, automatic emergency braking, and lane keep assist. There are several additional driver assistance features and camera views that you can get. If you plan on towing a lot or traveling with a full bed, then the bed view, hitch view, and auxiliary trailer camera might be of interest to you. It Can Give You the Best Engine for You There are four engine options you can consider finding the right one for your needs and desires. There's a 3-liter Duramax turbodiesel, a 6.2-liter EcoTec 3 V8, and a 5.3-liter EcoTec3 V8. The truck's standard engine is a 2.7-liter four-cylinder TurboMax. Come to Vachon Buick GMC in Old Saybrook, CT, for a great experience test-driving the Sierra 1500. We open at 9 AM six days a week.

Shopping for a powerful truck that knows no limits. You'll love everything about the new 2025 GMC Sierra HD. This truck has a commanding presence both on and off the road and all the features and amenities you need for a comfortable, luxurious, and enjoyable driving experience. Whether you plan to use this truck for work, play, or both, you can count on one thing: its power and capabilities won't disappoint. 1. Engine Power and Performance The new GMC Sierra HD is a heavy-duty pickup truck with impressive power. Drivers will have different engine options based on the model they choose, including the 6.6L Turbo-Diesel V8 engine with an Allison 10-speed automatic transmission, which comes standard on the Denali Ultimate and is an available option on the PRO, SLE, SLT, AT4, Denali, and AT4X models. There's also a 6.6L V8 gas engine with an Allison 10-speed automatic transmission that comes standard on the base model. The turbo diesel engine has 975 pound-feet of torque and 470 hp and the 3500 model has a max towing capacity of up to 36,000 pounds while the 2500 crew cab model has a max towing capacity of 21,870 pounds. more 2. The Versatile and Customizable trims Drivers interested in purchasing the Sierra HD truck will have plenty of options to choose from, including the 2500 and 3500 models. It's available on the following trims: the PRO, SLE, the SLT, AT4, the Denali, the AT4X, and the Denali Ultimate. The Denali Ultimate is the highest trim with the most amenities and features. It has all the Denali standard features plus additional amenities like a 12-speaker Bose premium series surround sound system, illuminated power steps, an exclusive Alpine Umber interior, full grain leather seating, 16-way power front seats with massage capabilities, and the signature Vader Chrome front grille. 3. The Interior Details and Tech Features If you're looking for a truck that combines luxury with power, you'll love everything about the new Sierra HD lineup. The Sierra HD has available best-in-class 16-way power front seats and is outfitted with luxurious details and high-quality materials like full-grain leather and open-pore wood. It also has the latest tech features including a 15-inch diagonal multicolor head-up display, a 13.4-inch diagonal center touchscreen, and a 12.3-inch diagonal color driver information center. The new GMC Sierra HD truck is truly a force to be reckoned with. If you want to learn more about this truck and all its driver convenience features and amenities, our sales associates can help you explore the trims and take you on a test drive. Visit us today at Vachon Buick GMC in Old Saybrook, CT to see the Sierra HD trucks in person, explore your favorite trims, and schedule your test drive.

The powertrain of your GMC includes the engine, transmission, driveshafts, differentials, and axles. To ensure your truck or SUV generates and delivers full force to the wheels with optimal efficiency, each drivetrain component must be kept in tip-top shape with regular preventative maintenance at your local GMC dealership. Here's an outline of what's involved in good powertrain care. Oil Changes and Engine Tune-Ups As the seat of your GMC's impressive power, the engine must always be well-lubricated with high-quality motor oil. This means routine oil changes twice a year or more. You should also have the engine examined and tuned up once a year. Cooling System Inspections Every component of the cooling system also needs to be professionally inspected once a year. In addition, it's wise to check the condition of your coolant monthly and have it flushed every two years. more Air Filter Replacements When the engine air filter becomes blocked by an accumulation of airborne debris, the cylinders can no longer draw in sufficient oxygen to operate properly. Replace your air filter once a year and check it periodically. Transmission Services The gearbox and clutch transmit the engine's power to the axles and wheels. Automatic transmissions are extremely complex and require yearly inspections. You'll typically need to flush the transmission fluid every 60,000 to 100,000 miles. Driveshaft Inspections The driveshaft is an often-overlooked part of the drivetrain that nevertheless serves a vital function. Ensure your driveshafts are properly lubricated and undamaged with yearly inspections. Differential Fluid Flushes A smaller gearbox exists inside each of your car's differentials that also requires high-quality fluid. You'll need to have your differential seals, gears, and fluid checked once a year. Axle Seal and Bearing Checks The axle seals and wheel bearings at the front and rear of your car need to be checked yearly. You'll occasionally need to replace both seals and fluid. Transfer Case Maintenance With all-wheel or four-wheel drive models, you'll also have a transfer case to maintain. This component transfers power to both the front and rear axles, playing a key role in the drivetrain. If your vehicle has a transfer case, the fluid inside requires flushing every 25,000 miles or so. Schedule Routine Powertrain Care with Us The considerable power and dependable performance of your GMC truck or SUV will continue for many years and possibly even decades with regular service. Allow us to take good care of your drivetrain for you. With routine scheduled maintenance, we'll minimize the risk of parts wearing out or failing prematurely. Visit Vachon Buick GMC in Old Saybrook, CT, to have your truck or SUV's powertrain promptly serviced by experience technicians.

The 2025 GMC HUMMER EV SUV is one of the most outstanding adventure vehicles. Its powerful powertrain and high-end performance can challenge all explorers and environmentalists. more 6 Bold Capabilities of the 2025 GMC HUMMER EV SUV Unapologetic Power Whether you're driving through the downtown or conquering the great outdoors, the 2025 HUMMER EV SUV has the power to take you places. With an electric motor on each axle and a high-capacity battery, the base powertrain provides 570 horsepower and 7,400 pound-feet of torque. A three-motor layout with one front and two rear motors is available, boosting the output to 830 horsepower and 11,500 pound-feet of torque. Personalized Driving With five standard drive modes, you can easily adapt the SUV's dynamics to the road conditions or your driving style. In Normal mode, the HUMMER EV SUV offers balanced power and fuel economy, delivering a comfortable drive on asphalt. For smooth rides on grass, gravel, or dirt, you can switch to the Off-Road mode, which also optimizes driving dynamics for snow-covered roads. The Tow/Haul mode optimizes the torque and power distribution for efficient trailering, while the Terrain mode enables one-pedal driving for precise control in extreme off-road conditions or for rock crawling. You can also configure the various drive systems to suit your preferences with the personalizable My Mode. 4-Wheel Steer The innovative 4-Wheel Steer function syncs the front and rear tires in specific ways to reduce the turning circle, allowing you to perform tight turns. It can also turn the rear wheels in phase with the front wheels, enabling CrabWalk. This model allows you to move the SUV diagonally, so you can easily traverse tight trails or narrow streets. Extract Mode Incredibly capable of getting out of dangerous situations, this bold SUV also comes standard with an Extract Mode. This mode activates the adaptive air ride suspension, increasing ground clearance to 16 inches and enabling water fording at depths of 32 inches, allowing you to drive over tough obstacles, such as water creeks, ruts, and boulders. Available Watts to Freedom While the HUMMER EV SUV is made for the great outdoors, it is also incredibly agile on asphalt. To enhance its on-road performance, the Watts to Freedom mode, which is standard on the 3X trim level, reduces the ground clearance, improving the SUV's aerodynamics. It also provides power bursts when needed, meaning you can enjoy adrenaline-inducing acceleration with a 0-60 mph time of up to 3.5 seconds. Born to challenge the great outdoors yet incredibly agile on streets, the 2025 HUMMER EV SUV is the ultimate adventure vehicle. Visit us today at Vachon Buick GMC in Old Saybrook, CT, to explore it in our showroom or test it on the road.