the Chevrolet Dealership has all of the special diagnostic equipment, the special tools, and the special training from General Motors to diagnose and service your Aveo; a regular mechanic is fine for most things, but when you have a problem that your regular mechanic can't solve with the tools and diagnostic equipment he has, but probably the largest advantage is if your aveo is still under warranty; Chevrolet eats the cost of Diagnosing and repairing your car with warranty repair work.