Welcome to Brennan Buick GMC


At Brennan Automotive, we're here for you throughout the life of your vehicle. If you're in the market for a brand new truck, SUV, or car, visit our dealership to see the best that Buick and GMC have to offer. We stock the best models, like the 2021 Buick Encore, 2021 GMC Sierra 1500, and the 2021 GMC Terrain, and any of our well-trained sales team members would be happy to help you find the vehicle that fits your needs. Check out our model overviews to learn more about the vehicles on our lot! If you're on a budget, check out our extensive used car inventory for great deals on the most popular used models.

After you find your car, truck, or SUV, keep it running well with visits to our Service Department for routine maintenance. Our technicians are certified to insure that all work on your car is done right the first time. Our Parts Department is also well stocked and ready to make sure that we have the part your vehicle needs as soon as possible to get you back on the road.

Here at Brennan Automotive, we are proud to serve Plattsburgh, The North Country, The Adirondacks, and Burlington, Vermont.

Want to Talk Auto Finance?

Need Financing For Your Next Buick or GMC?

If you are thinking about leasing or buying a vehicle but hesitant about the financing, perhaps you've not had an opportunity to check out Brennan Buick GMC in Plattsburgh. The car lot is filled with inventory which Brennan Buick GMC is ready to move out. In other words, it's a great time to buy or lease while letting our team of finance experts work out a monthly payment plan you can smile about. Due to their on-going relationships with financial institutions, they've been able to get financing easily arranged for you. Our finance team is hard working and creative so you can trust in them. Go online and choose the car you'd like to test drive, then stop by Brennan Buick GMC and do just that. Residents of Plattsburgh, The North Country, The Adirondacks and Burlington VT are bound to find something on the lot that, as they say, has their name on it. Bring your enthusiasm and your down payment and let our team of finance professionals remove the "test" so you can just drive off our lot.

We Keep You Going

Consistent Excellence at Brennan Buick GMC's Service Center

At BrennanKnight Buick GMC's service center in Plattsburgh, you can count on expert service and high-quality parts. We have built a reputation for excellence in service and our mechanics intend to keep it that way. What can you expect when you bring your vehicle in to get serviced at Brennan Buick GMC? You can be confident that your Buick or GMC vehicle will be repaired or serviced with the utmost attention to detail. We also posit that your vehicle will be serviced with original, high quality manufacturer's parts. Maintaining the integrity and safety of your Buick Enclave, Encore, Envision, GMC Acadia and Sierra 1500 vehicle entails using the right parts for the repair. If what you need is not in our inventory, we can order it from our manufacturer. The Brennan Buick GMC name is synonymous with quality workmanship and distinguished service. If your car, truck or SUV is due for an inspection, or if it needs to be repaired, the service center at Brennan Buick GMC in Plattsburgh is open and ready to serve drivers from The North Country, The Adirondacks and Burlington VT.

Get in Touch

383 RTE 3
Directions PLATTSBURGH, NY 12901

  • Contact Our Sales Department: 518-310-2376
  • Monday8:30 am - 5:00 pm
  • Tuesday8:30 am - 5:00 pm
  • Wednesday8:30 am - 5:00 pm
  • Thursday8:30 am - 5:00 pm
  • Friday8:30 am - 5:00 pm
  • Saturday8:30 am - 1:00 pm
  • SundayClosed
  1. Brennan Buick GMC

    383 RTE 3

    • Sales: 518-310-2376
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