Find us online today at br In need of GMC service shop in the Marietta OH vicinity? Pioneer Buick GMC is just a short drive away with all the necessary equipment and highly trained technicians to help. We have a large inventory of auto parts such as brakes, struts, coils, spark plugs, oil filters, exhaust systems, ignition coils, and more are available. Pioneer Buick GMC, just a brief distance away from Marietta OH, is dedicated to providing these essential materials and services for your GMC.