Looking for reputable service department in Chicago area

Try the Mechanic files on the Car Talk website. Enter a zip code and Toyota and then read the reviews. Consider the shops with many reviews and then call for Prius experience. Of course you may want to consider what work you want them to do since not much goes wrong. Could ask if they have worked on a Prius and what did they do? In my opinion, oil changes, rotations and dead 12v batteries are the most common services, all of which are pretty simple. Even brake changes are not likely unless you keep the car a long time. Ten years from now, when and if you need something significant, call around at the time since the shops will have much more experience by then.

 

For routine maintenance, any competent tech should be able to handle it. Just make sure they are using the required 0w20 synthetic oil for oil services.