Based in Stockton, Calif., Quality Tune Up is a full-service auto care center. The company has been operational since 1976, offering a wide array of services, such as transmission, smog check, oil change, power steering service, scheduled maintenance, air conditioning, preventative maintenance and fuel injection among others. In addition, Quality Tune-Up provides certified smog service and repair. The State of California has authorized the company to make adjustments or repairs, at each location, on the spot.