Sooner Complete Automotive Service has been serving Cumming for more than 18 years. This full-service auto/truck care business welcomes all vehicle models. Get complete maintenance, from mufflers to electrical, and a wide range of mechanical services. Drive into Sooner Complete Automotive Service and get an emission testing or call to schedule an appointment for auto repair. Sit back and relax in the friendly atmosphere here while you wait. ASE-certified service technicians will take care of your vehicle.