As part of replacing the cabin air filter, the tech disconnected the coolant line which goes to the coolant expansion tank but failed to reconnect it. As a result, as I drove home roughly a half gallon of coolant was sprayed all over the passenger side of the engine compartment and the underside of the hood, and puddling on the garage floor. Fortunately I possess sufficient car knowledge to locate the open line, reconnect it, and replace the lost coolant. I then cleaned the engine, the underside of the hood, and the coolant dripping onto the garage floor. If I were unable to accomplish this on my own, Cornerstone would have paid for the car to be flat bedded back to the service department to resolve the problem. As a trivial matter, the clips holding the filter were also not closed and left open. East to address but frustrating, especially given the coolant issue.

Amanda Deustch took care of my financing while I was going through an active Chapter 13 bankruptcy. She got me exactly what I needed. She was so prompt with her responses and answered my questions with great detail. I could not have had a better experience. She is the best!

Thank you for prompt sales servicing with Mark Cosgriff with Cornerstones Motors! We are completely satisfied with Mark and our new vehicle?

The process of buying my truck and trading in my old truck was a very pleasant experience, unlike I've had at other dealerships in the past. Everyone involved, from my salesperson Oscar to management and finance, was extremely helpful, polite, and professional. I will gladly work with Cornerstone of Stillwater in the future.

Been coming here for years to buy and service my vehicle’s. Love the way they support the community from the local food shelves, youth sports and the chamber. Keep it up.

Thanks for the great work and within the timeframe. Nice job Wes and body shop crew.

Helped me get exactly what I wanted. Jim is knowledgeable and straight to the point.

Jim Boening in sales made my purchase so easy and enjoyable. He was helpful showing me all the new features of my new vehicle. He is a top notch guy!

We went out of our way to go to cornerstone Chevrolet in Stillwater. They responded quickly and they had what we wanted. So pleased we made the drive. Working with Isaac Anderson was a pleasure.

NICHOLE SERVICE WRITER CARES ABOUT THE CUSTOMER NEEDS AND CONCERNS. SHE NEEDS HER NAME ON THE GLASS AT HER DESK WITH 5 STARS. DON B

Cornerstone continues to impress me. Mike Kahn is a great general manager - he is honest and communicates well. Isaac A. treats his customers with phenomenal professionalism and follows through with details and questions. A great experience!

Corey M, is the greatest! He makes it so easy to buy a vehicle. He is helpful, knowledgeable and goes the extra mile.

Katie Little reached out to me to offer information in regard to a 2026 Trailblazer I was interested in purchasing. She gave me great information and invited me out to see the vehicle. I met her and she gave me a great tour of the vehicle and facility. After speaking with her I knew she was the right person to work with for this purchase. Once we got the Trailblazer information taken care of and the sale arranged I asked her about the 2025 Z71 RST Silverado that was displayed on the floor! She showed the vehicle and explained all the details including showing me features I didn't know were offered. Because of the quality and care Katie took with me and the conversation we had about the vehicle, without pressure from her, I decided to go ahead and purchase a second vehicle the same day! I cannot tell you how happy I was with the experience. The professionalism, and kindness that Katie showed throughout the process was second to none. I cannot stress enough, if you are in need of a vehicle, take the time to go see Katie Little at Cornerstone Stillwater Chevrolet! It will be the best decision and experience you could ask for when buying a vehicle! Thank you Katie! I appreciate you!

Jeremy and the technicians at Cornerstone do. Great job with service and repairs. The only problem is that they are so busy becuase word got out abothe quality of their work it's sometimes hard to get an appointment with them without waiting a week. A good problem to have but it's tough when you only have one car. I do wish they were open later but I understand staffing is difficult when you're that busy due to gokd work.

Over charge, over charge!! When Stillwater Moters was in you were treated fairly, but not Cornerstone Chev of Stillwater. (same places)