While a large ASE-certified logo announces their pedigree to the world, Sierra Hart Auto Center’s technicians busily service foreign and domestic vehicles beneath one of the facility’s many service bays. They deliver performance-enhancing boosts such as oil changes and full-scale repairs to keep cars in tiptop shape. Comfort and durability are locked in as the techs tweak faulty air-conditioning systems and radiators. And with the latest computer-diagnostic tools, they are able to determine vehicular health without waiting for the GPS navigator to cough. The center also offers 24-hour towing services and roadside assistance, as well as a free shuttle that escorts customers downtown and back while their cars are being serviced.