Can much be done with one of these: LS1 GEN III Commodore USB OBD 2 diagnostic scan tool - eBay, Other Car Parts, Accessories, Car Parts, Accessories, Cars, Bikes, Boats. (end time 11-May-08 11:42:02 AEST)
Like a tune etc? Can anyone do it?
interesting question, unfortunately i have no idea.
No you can not tune with these. They are a diagnostic tool only.
Can they be used it your car has had a tune and has had its computer locked?
it only reads output variables nothing more.