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A Car Dealer You'd Send Your Friend to: Sommer's Buick GMC

2025 GMC Sierra 2500 conquering a rocky terrain

When it comes to finding a dealership you can trust, one name stands out near Milwaukee—Sommer’s Buick GMC. Family-owned and serving the community for over 60 years, Sommer’s isn’t just another car lot; it’s a place where customers become lifelong friends. Whether you’re searching for a powerful GMC Sierra 1500, Sierra 2500, or Sierra HD, or a dependable Certified Pre-Owned vehicle, you’ll find top-quality options and a friendly car dealer who puts your needs first.

At Sommer’s Buick GMC, there’s no pressure—just expert guidance, award-winning service, and a commitment to helping you drive away in the perfect vehicle. Stop by our dealership today or contact us to experience the difference for yourself!

A Legacy of Trust and Excellence in the Milwaukee Area

For over 60 years, Sommer’s Buick GMC has built a reputation as a friendly car dealer that puts customers first. Located in Mequon, just outside Milwaukee, we’ve helped generations of drivers find the right car, truck, or SUV.

What makes us different?

  • Family-Owned Values – We treat every customer like a neighbor, not just another sale.
  • Years of Experience – Serving Milwaukee-area drivers since 1946 with honesty and care.
  • No-Pressure Sales – Our team helps you find the best fit without the stress.

Whether you need a rugged Sierra 1500 for tough jobs or a reliable SUV for your family, we’ve got you covered. Our focus is on quality, trust, and making sure you leave happy.

Looking for a dealership that feels like home? Visit Sommer’s Buick GMC and see why so many drivers keep coming back.

Your Friendly Car Dealer with a Vast Selection of Vehicles

Finding the right vehicle should be easy. At Sommer’s Buick GMC, we make sure it is. As a trusted Milwaukee car dealer, we offer a wide selection of new and used models to fit every need.

Looking for power? The Sierra 2500 is built for tough jobs, towing, and off-road adventures. Need something smaller? Our lineup includes reliable SUVs and sedans perfect for daily drives.

Here’s what you’ll find on our lot:

  • GMC Trucks – Strength meets style with models like the Sierra 2500 and Sierra 1500.
  • Buick SUVs – Comfortable and stylish options like the Encore, Envision, and Enclave.
  • Certified Pre-Owned Vehicles – Quality-checked cars with warranty coverage for extra peace of mind.

No matter what you need, our team is ready to help. Stop by today and find the right fit for you!

The Power of Choice: Find the Right GMC Sierra for Your Needs

A great truck is more than just a way to get from one place to another. It should work hard, last long, and fit your lifestyle. At Sommer’s Buick GMC, we help you find the right one. Whether you need a strong work truck or a weekend adventure vehicle, we have a Sierra HD to match.

Choose the Right Sierra for the Job

Not sure which Sierra is best for you? Let’s break it down. The Sierra 1500 is great for everyday driving and light towing. It offers a smooth ride, modern tech, and fuel-efficient engines. If you need more power, the Sierra 2500 HD steps up with a stronger V8 and advanced towing tools. For the biggest jobs, the Sierra 3500 HD delivers extreme towing power, dual rear wheels, and the highest hauling strength.

Each Sierra HD brings the toughness and smart features you need to handle any task.

Why Choose a GMC Sierra?

There’s a reason so many drivers trust the Sierra. These trucks bring a mix of power and comfort, making them great for work and play.

  • Strong towing – Whether you're hauling a trailer, boat, or equipment, the Sierra has the muscle to get the job done.
  • Smart technology – Built-in trailering tools, multiple camera views, and driver-assist features make towing and driving easier.
  • Durability – With high-strength steel and heavy-duty parts, the Sierra is made to last.

Sommer’s Buick GMC has cars for sale that fit every driver. If you need a truck that works as hard as you do, visit us today. Let’s get you behind the wheel of the perfect Sierra!

More Than Just Sales: Award-Winning Service You Can Rely On

A great dealership does more than sell cars. It takes care of drivers long after they leave the lot. That’s why Sommer’s Buick GMC is proud to offer top-notch service for every customer. Our team is here to help with everything from routine maintenance to major repairs.

Expert Service with a Personal Touch

When your vehicle needs attention, you want a team you can trust. Our skilled technicians know the ins and outs of every model. They use the latest tools and genuine parts to keep your car running at its best. We work hard to get you back on the road quickly and safely.

At our service center, we offer:

  • Oil changes – Keep your engine running smooth with fresh oil and a clean filter.
  • Brake service – Stay safe with expert brake inspections and replacements.
  • Tire care – From rotations to replacements, we help your tires last longer.
  • Battery checks – Avoid breakdowns with regular battery testing and replacement.
  • Full inspections – Catch small issues before they become big problems.

A Friendly Team You Can Trust

Service shouldn’t be stressful. That’s why we focus on clear communication, honest pricing, and customer care. Whether you drive a rugged truck or a daily commuter, we treat your vehicle like it’s our own.

Need routine maintenance or a repair? Our friendly car dealer is here to help. Stop by Sommer’s Buick GMC today and experience service done right!

Supporting Milwaukee: A Dealership That Cares About the Community

A great dealership does more than sell cars. It gives back to the people who support it. At Sommer’s Buick GMC, we believe in helping our neighbors. That’s why we take part in local events, support charities, and lend a hand where it's needed most.

A Commitment to Giving Back

Our team is proud to serve Milwaukee and nearby communities. We don’t just do business here—we live here, too. That’s why we work hard to support local schools, fundraisers, and programs that make a difference.

Here are a few ways we give back:

  • Local sponsorships – We partner with schools, youth teams, and events to help our community grow.
  • Charity support – Giving to food banks, shelters, and other causes is part of who we are.
  • Community events – We love hosting and taking part in gatherings that bring people together.

A Dealership That Puts People First

We believe trust is earned through more than just good service. It comes from being a part of something bigger. That’s why when you visit our lot, you’re not just a customer—you’re a neighbor.

Whether you need a tough Sierra 2500 for the job site or a reliable SUV for your family, we’re here to help. With a full lineup of vehicles, Sommer’s Buick GMC has cars for sale that fit every need.

Looking for a dealership that cares? Visit us today and see why we’re more than just a place to buy a car.

How’s the After-Sales at Sommer’s Buick GMC?

Buying a car is just the start of the journey. Keeping it in top shape matters just as much. At Sommer’s Buick GMC, we make sure every driver gets the best service long after they leave the lot.

Service You Can Trust

As a friendly car dealer, we believe in taking care of our customers beyond the sale. Our trained techs are here to help with everything from routine check-ups to major repairs.

Here’s what you can expect:

  • Expert maintenance – Oil changes, tire rotations, and brake checks keep your vehicle running smoothly.
  • Genuine parts – We use factory parts to ensure a perfect fit and long-lasting performance.
  • Fast, reliable repairs – Our team handles big and small fixes with care and precision.

Built for the Road Ahead

Whether you drive a sedan or a Sierra HD, you need a service team you can count on. We make it easy with:

  • Convenient scheduling – Book your appointment online or give us a call.
  • Competitive pricing – Fair rates on maintenance and repairs with no hidden fees.
  • Customer-first care – We explain every step, so you always know what’s happening with your car.

At Sommer’s Buick GMC, we don’t just sell cars—we help you keep them in peak condition. Visit us for top-quality service and a team that puts your needs first.

Offering the Finest Customer Service and Best Deals

At Sommer’s Buick GMC, we believe that buying a car should be easy and stress-free. From the moment you walk in, our team is here to help. Whether you're looking for a family SUV or a tough Sierra 1500, we make sure you get the right vehicle at the right price.

A Customer-First Experience

We take pride in being a Milwaukee car dealer that puts people first. Every customer is treated with respect, honesty, and care.

Here’s what makes our service stand out:

  • No-pressure sales – We help you find the best car for your needs without pushing for a sale.
  • Clear pricing – No hidden fees or surprises—just great deals from the start.
  • Expert advice – Our team knows cars inside and out. We’ll help you make the best choice.

Deals That Work for You

Getting a great deal isn’t just about the price. It’s about finding the best value. That’s why we offer:

  • Special offers – Save on new and used cars with our rotating deals.
  • Flexible financing – We work with you to find loan or lease options that fit your budget.
  • Trade-in assistance – Get top dollar for your current vehicle to put toward your next one.

At Sommer’s Buick GMC, we go beyond selling cars. We build lasting relationships. Visit us today and see how we make car buying better.

Best Financing Options for Everyone!

Buying a car is a big decision, and finding the right financing makes all the difference. At Sommer’s Buick GMC, we make the process easy. Whether you're looking for a reliable SUV or a powerful Sierra 2500, we have options to fit your budget.

Flexible Financing for Every Buyer

No matter your credit score, we work hard to find a plan that works for you. Our finance team partners with trusted lenders to secure the best rates.

Here’s how we help:

  • Low-interest loan options – Competitive rates that keep payments manageable.
  • Lease programs – Lower monthly payments with flexible terms.
  • Bad credit solutions – We assist buyers with all credit backgrounds.

A Simple and Stress-Free Process

We believe financing should be quick and hassle-free. That’s why we offer:

  • Fast online pre-approval – Apply from home and know your options before visiting.
  • Trade-in evaluations – Get top value for your current car to put toward your next one.
  • Clear terms – No hidden fees or confusing fine print.

At Sommer’s Buick GMC, we have cars for sale to fit every budget. Visit us today and drive home with confidence.

A Car Dealer You'd Send Your Friend To

Finding the right car should be simple. At Sommer’s Buick GMC, we help drivers in Milwaukee find a vehicle that fits their needs. Whether you're looking for a powerful Sierra 1500, a capable Sierra 2500, or a rugged Sierra HD, we have a wide selection waiting for you.

Our team is here to help every step of the way. From exploring features to securing financing, we make the process smooth. Have questions? Contact us today to learn more about our inventory, current deals, and top-rated service.

Keep Exploring

A great vehicle is just the start. Take your truck on an outdoor adventure or explore all Milwaukee has to offer. Whether you're looking for the best parks near Mequon for a weekend escape or planning a trip to some of the city's top attractions, we’ve got you covered.

Want to know why GMC trucks are perfect for your next adventure? Find out how they handle tough terrain, long road trips, and outdoor fun. Click here to discover more ways to make the most of your vehicle.

Your next great ride is waiting at Sommer’s Buick GMC. Stop by today or browse our site to find the perfect truck for your lifestyle.

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6 Bold Features of the 2025 GMC Sierra HD

Whether you have things to tow, haul, or need a rugged truck for serious off-roading, you can't go wrong with a 2025 GMC Sierra HD model. From heavy-duty performance to advanced technologies, this year's lineup is packed with bold features you'll love. Pro-Grade Towing and Hauling The Sierra HD lineup comes standard with a 6.6L V8 gas engine that delivers pro-grade hauling power. Maximum payload capacities range between 3,788 and 7,237 lbs, depending on the configuration and trim. An available 6.6L V8 turbo-diesel engine tunes the truck for heavy-duty towing, with max trailering capacities varying from 22,390 lbs in the Sierra 2500 HD to 36,000 lbs in the Sierra 3500 HD. Heavy-Duty Trailering Provisions Whether you opt for the gas or the turbo-diesel engine, each Sierra HD model comes well-equipped for towing. GMC's Trailering Package, which is standard across the lineup, includes a hitch, hitch platform, connectors, wires, and hitch guidance, to name a few. In-vehicle trailering apps are optional and allow you to enhance your truck with a trailering checklist as well as trailer maintenance reminders and security alerts. more Bold Appearance A massive, unapologetic exterior design makes this truck perfect for those who want to stand out. Chrome front and rear bumpers and an iconic grille design create a flashy appearance. Animated LED projector headlights with integrated daytime running lights and LED turn signal indicators will make you feel more connected to the vehicle. For easier bed access, the rear bumper integrates a CornerStep. Upscale Comfort The Sierra HD is available in a range of cab varieties, but they all provide premium comfort. In the three- and six-passenger configurations, the spacious front bench includes under-seat storage. Five-passenger configurations with front bucket seats and rear under-seat storage are also available, so you can easily customize the cabin to suit your needs. Upholstery materials vary from heavy-duty vinyl and cloth to luxurious leather. Advanced Tech Features Built for commercial and other heavy-duty applications, this truck also comes with an advanced infotainment system. The seven-inch center touchscreen provides access to Bluetooth phone control and audio streaming, as well as next-gen smartphone integration with Apple CarPlay and Android Auto. Each trim also includes Wi-Fi hotspot capability, so you can keep your crew connected and entertained. Smart Driver Assistance All Sierra 2500 HD models come standard with the Sierra HD Pro Safety Package, a suite of driver assistance technologies that includes a wide range of anti-collision and lane management features. Front pedestrian braking and automatic emergency braking can also keep you nearly worry-free behind the wheel. The Sierra 3500 HD models come with the Pro Safety Plus Package, which adds trailer coverage and rear cross traffic alerts, among others. Ready to schedule your test drive? Contact us today at Sommer's Buick GMC in Mequon, WI.

2025 GMC Sierra EV, pickup

Explore the 2025 GMC Sierra EV

The 2025 GMC Sierra EV is a versatile electric truck ready to handle your hauling and towing needs. It impresses with a huge cabin, advanced tech features, and vehicle-to-home capability that allows you to transform it into a power generator. 2025 GMC Sierra EV Performance The 2025 Sierra EV is a full-size electric truck with a standard four-wheel drive layout and two battery options. Its standard extended-range battery provides 645 horsepower and 785 pound-feet of torque in Max Power mode. That's plenty of spirit for confident highway overtaking and rugged off-roading. If you enjoy high-speed driving, the max-range battery pack delivers up to 760 horsepower, enabling you to accelerate from 0 to 60 mph in under 4.5 seconds. more Range and Charging Regardless of the battery you choose, this truck can take you far on a single charge. The standard battery pack has an estimated range of 390 miles, while the max-range battery can power through up to 460 miles per charge. Both batteries support 800V fast-charging at speeds up to 300 kW or 350 kW, respectively. Versatile Utility With an almost six-foot bed and a cargo volume of 57.50 cubic feet, this electric truck can haul bulky cargo like a champ. GMC also equips it with a MultiPro tailgate and midgate, two features that add flexibility. With the midgate open and the tailgate adjusted for maximum length, the bed can fit items up to 10'10" long. Utility doesn't stop at hauling cargo. This truck also boasts vehicle-to-home capability, which means you can use it as a backup power generator during blackouts. Moreover, a 7.2 kW AC offboarding power station can power up your off-grid workplace or campsite. Advanced Tech Features From driving enhancement to driver assistance, connectivity, and entertainment, this truck is packed with advanced tech features. Selectable drive modes, including 4-Wheel Steer and CrabWalk, adjust performance for easier maneuverability. The Super Cruise driver assistance technology allows you to drive hands-free on compatible roads. A Google-based infotainment system makes navigation a breeze with Google Maps, while SiriusXM with 360L enhances your driving experience with quality music and shows. Full-Size Towing Power The Sierra EV is a great off-roader and is also great for towing, with a trailering capacity of 10,500 pounds. That's plenty of power for a wide variety of cargo, toy, and camper trailers. Luxe Cabin and Comfort With its luxurious cabin, this truck also allows you to enjoy your time behind the wheel. Heated and ventilated front seats provide year-round comfort, while passengers can stay toasty in cold weather thanks to the heated rear seats. The front seats also have multiple power adjustments and driver's side memory. A Super Cruise steering wheel adds convenience, alerting when entering and leaving compatible hands-free zones. A heads-up display is also standard, so you can check driving information without taking your eyes off the road. To try all these features yourself, visit our showroom at Sommer's Buick GMC in Mequon, WI.

2025 GMC Sierra 1500 interior

3 Impressive Details of the 2025 GMC Sierra 1500

GMC trucks are legendary for the rugged styling, hard-working capability, and elevated features that distinguish the brand from its competitors. The 2025 GMC Sierra 1500 opens the next chapter of automotive excellence from GMC's line of light-duty full-size trucks, providing many impressive details that set it apart from the crowd. Versatile Power and Efficiency Thanks to Four Engine Options Thanks to four versatile engine options, the Sierra 1500 is perfect for any purpose, whether it's traveling around town or hauling heavy loads to the jobsite. The base engine is the innovative and efficient TurboMax, which generates 310 horsepower and 430 foot-pounds of torque when paired with an 8-speed electronically controlled automatic transmission. Available in either RWD or 4WD, the Sierra can handle any task required with power and efficiency. For those who prioritize V8 power, there's a 5.3-liter EcoTec3 V8 that churns out 355 horsepower and 383 foot-pounds of torque, and an even larger 6.2-liter V8 that produces 420 horsepower and 460 foot-pounds of torque. Both V8 powerplants are paired with a 10-speed electronically controlled automatic transmission. There's even a 3.0-liter Duramax turbo diesel available for diesel aficionados that offers 305 horsepower and 495 foot-pounds of torque. more Impressive Towing and Payload Hauling Capabilities The towing and payload capabilities of the Sierra 1500 are impressive, whether you're transporting people and gear in the cab, hauling a bed full of building materials, or towing a boat to the nearest body of water. The Sierra comes with a standard 6.5-foot bed that offers 71.7 cubic feet of cargo volume and a maximum payload capacity of 2,530 pounds when properly outfitted. The towing capacity of the Sierra 1500 gives it the power to pull heavy loads with ease, with a maximum capacity of up to 13,300 pounds with the proper equipment. A robust lineup of tow-friendly features and accessories streamlines the task of trailering even further, and those features include options like the ProGrade Trailering System, hitch guidance, hitch view, an in-vehicle trailering app, built-in trailer hardware, and auxiliary trailering cameras. Incredible Infotainment and Driver Assistance Technology Modern technology is thoroughly embraced in the Sierra 1500 through its many safety, driver assistance, and infotainment systems. It includes many innovative driver assistance features, which helped it secure a 5-star overall safety rating from the National Highway Traffic Safety Administration. Those features include the Pro Safety system, forward collision alert, lane keeping assist, automatic emergency braking, and following distance indicator. The infotainment features in the Sierra 1500 include the GMC Premium Infotainment System, built-in Google compatibility, a 7-inch color touchscreen display, a 3.5-inch driver information center, Wi-Fi hotspot capability, and Apple CarPlay and Android Auto connectivity. The Sierra 1500 embodies everything a driver could want in a full-size truck, with multi-purpose power, rugged good looks, and a range of helpful features that keep occupants safe and connected. Contact Sommer's Buick GMC of Mequon, WI, today to schedule a test drive.