Welcome to Mark Allen Buick GMC. Let’s do business!! Mark Allen Buick GMC has a large inventory of new and used Buick and GMC cars. We are located just a short drive from anywhere in the Tulsa Metro and our staff can help with professional advice to help you find the perfect GMC car, truck or SUV. We have a variety of colors and trims available for our vehicles. When looking into purchasing a new or used car it is important to know you are buying quality. At Mark Allen Buick GMC we make sure our new and used cars, trucks and SUV's are in peak condition. Be sure to stop by the next time you are in need of car help and let us take care of you. We look forward to assisting you with your purchase.