A cool thing I have found if you have a Android, tablet or bluetooth laptop. It is a cheap OBD2 scanner, code clearer, data logger, gauge display, ect. A friend of mine has one and I have seen it in action. You can purchase the bluetooth OBD2 wireless device for 20 dollars on ebay now (search elm327) and then 5 dollars for the app on your phone called Torque. I do not know anything about APPLE products so you will have to do your homework to see if anything is available. Software for the computer is free. If your laptop is not bluetooth capable, you can get a usb to bluetooth device for under $5 on ebay shipped.
If you have any questions, PM me.
I have one of these BT adapters and run torque. Works great! Very advanced. Love being able to datalog and clear engine codes wirelessly.
Make sure that you get the bluetooth adapter with the smallest footprint. The camaro has the OBD2 adapter in the worst location... I have the "Mini" version and i bump it all the time getting in and out of my car.