O'Fallon Buick GMC

Bought my Acadia here and have continued to come back for service. They do a nice job!

Ihad an amazing experience purchasing my brand-new 2026 Buick Envista from Roger Silva at GMC O'Fallon! From the very beginning, Roger made the process easy and stress-free. He was able to get me pre-approved before I arrived, which made everything quick and simple once I got to the dealership. There was absolutely no hassle, and I drove away feeling confident in my purchase and in love with my beautiful new car. Roger took great care of me every step of the way and made sure I had a fantastic buying experience. I highly recommend asking for Roger Silva. Thank you, Roger, and thank you to everyone at GMC O'Fallon for making this such a great experience!

I would never take my car anywhere else. They have the most honest, thorough, and efficient service staff from check in to to check out. They are just the best!

I received Superior Customer Service from the Beginning to the End but I would especially like to Thank My Salesman Beau who was Absolutely Amazing ?. Thank you so very much Beau for all you do and the Entire Staff you all are Extremely Professional and Courteous. Job Well Done.

I think her name was christy and I was sold a 2026 GMC Sierra The only issue I had with the whole process was not being able to use the GM discount from my retired father. She told me that my dad had to be there and then she said the discount wouldnt be worth it. Other than that she was amazing

Thanks Blake, Hakeem, and the O’Fallon Buick GMC team! Love my new Sierra 1500 SLT already and really appreciate the great buying experience and all your help!

Excellent sales reps, excellent car service and not time consuming for service appointments . Best dealership ever

March 20th Paul sold us a 2023 GMC Sierra 1500, shortly after we left he asked if I would give him 5 stars. I did. I REGRET NOW!!!! He sold us a "lemon" ! This truck has been in the shop more than I've driven it in this month of owning it. And of course each time a bill to go with it out of our pocket. So please if anyone plans on buying from this dealership have someone check it out first!!!

I have always gone to this dealer with my car. My last appointment was on April 9th due to my tire sensor monitor alerting me. Although not happy about the situation , I always know I can call and get an honest opinion and get my car in within a reasonable timeframe. I usually wait for my car and I am kept up to date on its progress Personnel are courteous and friendly akways I would recommend this dealership uo everyone I know

Chip was so helpful and kept us updated with the progress of our car. He took time to help us get set up with a loaner car while ours was being serviced.