View Our Incoming Inventory HERE and Reserve Yours Today!

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Each Buick/GMC Certified Pre-Owned vehicle is thoroughly inspected and reconditioned and includes factory-backed limited warranties and roadside assistance.

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Current Offers

View this months current offers and promotions on select Buick/GMC vehicles.

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Welcome to McCaddon Buick GMC

Thank you for making your way to McCaddon Buick GMC, your certified Buick and GMC car dealership in Boulder and the surrounding areas. At our dealership, you’ll find a solid selection of new Buick and GMC models for sale, as well as a carefully inspected lineup of pre-owned vehicles

As a Boulder and Longmont car dealership, our professional and friendly sales and service staff prove our excellent track record daily. Our customers are treated with the utmost integrity, honesty, and professionalism. We have been an integral part of the Boulder community since 1958! If you are looking for a reliable Buick and GMC dealer in Colorado, then you’ve come to the right place. 


Not only will you be able to choose your next car from one of the largest vehicle inventories out of all the GMC dealers in Colorado and Boulder car dealerships, but you will also get help from a qualified team of finance experts. Our well-connected finance center can help you get the right loan or lease in a quick, easy, and transparent manner. We explain all of the financing details to our customers, so they are always in the know during their car shopping experiences in our Longmont car dealership. 


After purchasing your car, McCaddon Buick GMC is still here to help you with services and to be your one-stop Longmont car dealership. We offer certified services for your GMC and Buick vehicles at competitive prices, especially for common vehicle services including brakes and oil changes. We also have various specials daily, so you can save even more money when you choose us as your go-to Buick and GMC dealer in Colorado. Your vehicles will be in the good hands of our experienced services team!

Partner with McCaddon Buick GMC Today! 

Do you have questions about our inventory or services? Don't hesitate to contact us online or give us a call at 303-416-5046. Our friendly and knowledgeable staff are ready and waiting to assist you in any way we can! 

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McCaddon Buick GMC 40.02284, 105.23944.