Mark Allen Buick GMC is an excellent dealer to buy a vehicle from, with none of the games like some others play. The staff is helpful, knowledgeable, and a pleasure to deal with, providing straightforward explanations with no high pressure. They are genuine, approachable, and work to ensure a great experience, doing everything necessary to earn business with honesty and integrity. Customers are confident in their service. The dealership offers new Buick and GMC vehicles, as well as quality pre-owned cars, trucks, and SUVs in a variety of colors and trims, all in peak condition. Their service department and customer service meet all expectations, making for a perfect experience.
I've had my GMC truck serviced and repaired at Mark Allen in Collinsville several times. They are excellent to deal with and provide excellent service!! Can't recommend them enough. 5☆ all the way!!
December 2025
Excellent dealer to buy a vehicle from, and none of the games like some others like to play. Josh was our salesman, and he was very knowledgeable on the vehicle we purchased, as well as a pleasure to deal with. No high pressure, and straight forward explanations of details.
September 2024
Dakota was very professional, knowledgeable, and very personable! I had a great experience buying my car today!
