We are a Star Certified Test and Repair Station located in Concord, CA. We offer our customers great service. We have a state-of-the-art facility and professional technicians. We give top priority to customer satisfaction and we strive to satisfy each one of our customers. Stop by today! Clayton Treat Automotive is open Mon. - Sat. for your convenience. WE DO AUTO REPAIR AS WELL AS SMOG We offer the following services and more: brakes, oil changes, tune-ups, suspension, check engine light diagnostics/diagnostics, diagnostics for smog failure and repair